>>7540038that number is the golden ratio which was aparently used by some painters during the renaissance and it's said to be a harmonious proportion. if you pick the fibonacci sequence, which is a list that starts at 1 and has the next number as a sum of the current last number and the one before that, like (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89...), you can pick any couple of adjacent numbers and notice how they always meet those two conditions and the bigger the numbers you choose, the closer they get to the golden ratio
for instance let "a" be 5 and 3 be "b":
a+b/a = 5+3/5 = 8/5 = 1,6
a/b = 5/3 = 1,667...
now let "a" be 89 and "b" be 55:
a+b/a = 89+55/89 = 144/89 = 1,618...
a/b = 89/55 = 1,618... which are really close to the real thing, but can get closer if you pick bigger numbers
that spiral is formed if you align squares with sides equal to the fibonacci numbers
