The golden ratio formula is 0.6 18: 1, which is also called the golden section. It is a mathematical constant and is generally expressed by the Greek letter Ф. This is also the origin of the golden ratio. The golden ratio is an irrational number, and its approximate value is (20 decimal places): 0.6180339887498484820. Generally, it is 0.6 18: 1 in application.

The golden section is strictly proportional, artistic and harmonious, and contains rich aesthetic value, which is presented in the appearance of many animals and plants. Nowadays, the golden section is widely used in many industrial products, electronic products, buildings or works of art to show its functionality and aesthetics.

The characteristics of the golden section:

1, any number in the sequence is the sum of the first two numbers.

2. The ratio of the former number to the latter number approaches a fixed constant, namely 0.6 18.

3. The ratio of the last number to the previous number is close to 1.6 18.

4. 1.6 18 and 0.6 18 are reciprocal, and their product is approximately equal to 1.

5. Compared with the previous second number, the value of any number approaches 2.618; If compared with the second number, its value tends to 0.382. Straightened out, the above singular combination can not only reflect the two basic proportions of the golden section, 0.6 18 and 0.382, but also the following two mysterious proportions.