What else might be important about 3 and 5?

the golden ratio =

1.61803398875

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4

5

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More info

Golden ratio - Wikipedia

https://en.wikipedia.org/wiki/Golden_ratio

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In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities. The figure on the right ...

Decimal‎: ‎1.6180339887498948482...

Hexadecimal‎: ‎1.9E3779B97F4A7C15F39

Binary‎: ‎1.1001111000110111011

Golden Ratio - Math is Fun

https://www.mathsisfun.com/numbers/golden-ratio.html

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The golden ratio (symbol is the Greek letter "phi" shown at left) is a special number approximately equal to 1.618. It appears many times in geometry, art, ...

Golden Ratio -- from Wolfram MathWorld

mathworld.wolfram.com › Number Theory › Constants › Golden Ratio

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by EW Weisstein - ‎2002 - ‎Cited by 15 - ‎Related articles

The golden ratio, also known as the divine proportion, golden mean, or golden section, is a number often encountered when taking the ratios of distances in simple geometric figures such as the pentagon, pentagram, decagon and dodecahedron. It is denoted , or sometimes .