If three and four points three, two points one, 14 points five, five and four points one can form a proportion, then one of the proportions is

If three and four points three, two points one, 14 points five, five and four points one can form a proportion, then one of the proportions is

3:4:3:14:5 = 5:4:1:2:1

Which of the following ratios can make up the proportion? 0.2 to 0.4, 1 / 2 to 2.4, 1.2 to 2.4, 40 to 20, 14 to 35, can the four numbers in each group make up the proportion
The proportion is 10.125 20.25 1.6 24 9 0.8 12 180 10 6 / 1 4 / 3 2 / 1 4 / 1

0.2:0.4 = 1 / 2:2.4 (different out of proportion ratio) 1.2:2.4 = 40:20 (different out of proportion ratio)
1: 125 = 2:0.25 (energy composition ratio) 1.6:24 = 3 / 5:9 (energy composition ratio)
0.8:12 = 180:10 (different proportion) 1 / 6:3 / 4 = 1 / 2:1 / 4 (different proportion)
It's hard to play by hand~

2. What proportion can 3, 4 and 5 make up

The two sides of the ratio must be the inner product equal to the outer product, and none of them can be used unless they are added together. 2:3 = 4:5 the two sides are added together to be equal to 7