# What Is The Golden Ratio?

The golden ratio, also known as the golden number, golden proportion, or the DIVINE PROPORTION, is a ratio between two numbers that equals approximately 1.618.

Usually written as the Greek letter phi, it is strongly associated with the Fibonacci sequence, a series of numbers wherein each number is added to the last.

The Fibonacci numbers are 0, 1, 1, 2, 3, 5, 8, 13, 21, and so on, with the ratio of each number and the previous number gradually approaching 1.618, or phi.

# History Of The Golden Ratio

The first known mention of the golden ratio is from around 300 BCE in Euclid’s Elements, the Classical Greek work on mathematics and geometry.

Euclid and other early mathematicians like Pythagoras recognized the proportion, but they didn’t call it the golden ratio.

It wasn’t until much later that the proportion would take on its mystique.

In 1509, Italian mathematician Luca Pacioli published the book De divina proportione, which, alongside illustrations by Leonardo da Vinci, praised the ratio as representing divinely inspired simplicity and orderliness.

Because of Pacioli’s book and Leonardo’s illustrations, the golden ratio gained fame among mathematicians and artists.

In the centuries since Pacioli’s book, many enthusiasts have claimed that the number is naturally pleasing to the eye, that it is a mathematical distillation of beauty, and that golden ratio line segments, golden rectangle side lengths, and golden triangles are represented throughout art history.

Golden ratio enthusiasts argue that the golden ratio is aesthetically pleasing because it’s common in the natural world.

# Who else but God can Create Spiral Galaxies?

The proportions of nautilus shells and human bodies are examples of the golden ratio in nature, but these tend to vary greatly from one individual to the next.

Some seashells expand in proportion to the golden ratio, in a pattern known as a golden spiral, but not all shells do.

It’s true that nautiluses maintain the same shell proportions throughout their life, but the ratio of their shells is usually a logarithmic spiral, as opposed to an expression of phi.

Phi does show up in other aspects of nature. Tree leaves and pine cone seeds tend to grow in patterns that approximate the golden ratio, and sunflower spirals and other seeds tend to hew close to phi.

Phi allows for efficient distribution or packing, so leaves that grow in relation to the golden ratio will not shade each other and will rest in relation to one another at what is known as the golden angle.

There’s no evidence that use of the golden ratio is better than use of other proportions, but artists and designers are always in the business of creating balance, order, and interesting composition for their work.

# The Golden Ratio In Art and Graphic Design

A few artists and designers have deliberately based their work around the golden ratio.

Le Corbusier, a famous mid-century modern architect, based a good deal of his architectural system around the golden ratio.

Salvador Dali, the surrealist painter, intentionally used a canvas shaped like a golden rectangle for his painting The Sacrament of the Last Supper.

In 2001, American prog-metal band Tool released “Lateralus,” a song with Fibonacci-inspired time signatures.

Art historians have found other examples of the golden ratio in the Mona Lisa, the Parthenon in ancient Athens, and the Great Pyramid of Giza.

However, most of the time there is no explicit evidence that artists intentionally used the ratio the way Le Corbusier, Dali, or Tool did.

Without design notes or specifications for the pyramids, we can’t know if ancient engineers employed phi on purpose.