Ideal Body Measurements

Hi MFT, Happy New Year to you all, I was wondering if you guys know what are the ideal body measurements for our body parts? How do we know that our body parts are proportional? What are some ratios or formulas that help us calculates this data. From what I know the chest-to-waist ration is 1.618 which is the golden ratio which is hard to achieve. The waist-to -chest ratio should be 0.7 or less to be considered very fit. Thight-to-calve ratio is 1.63. Steve Reeves says that the neck, arms, and calves should be measured the same to be proportional. Is this true? Also,John McCallum’s realistic measurement ideals for hard gainers
1. 6.5 times your wrist gives chest girth
2. 85% of the chest girth produces the hips
3. Take 70% of the chest girth for the waist
4. 53% of the chest gives the thigh girth
5. The neck size is 37% of the chest
6. 36% of the chest produces the upper arm girth
7. The calves come out a little less at 34%
8. The forearms get 29% of the chest measurement

So how do we know how big should each bodypart be so that we can have a proportional body? I know this deals with height and weight. It also depends on the person's goals if he or she wants to look lean, ripped, muscular, slim, athletic, and etc.