The solution ratio is 2.25 of x = 3.75 of 2, 11 of 12:5 of 4 = 35 of 36:x

The solution ratio is 2.25 of x = 3.75 of 2, 11 of 12:5 of 4 = 35 of 36:x

2.25 of x = 3.75 of 2
2.25：x=3.75：2
3.75x=2.25*2
3.75x=4.5
x=1.2
11 out of 12: 4 out of 5 = 35 out of 36: X
11x of 12 = 4 of 5 * 35 of 36
11 out of 12 x = 7 out of 9
X = 7 / 9 ÷ 11 / 12
X = 28 / 33

List the proportion and find out that the ratio of 0.25 and 8 / 1 is equal to the ratio of X and 10. 4 / 1 of a is equal to 5 / 1 of B. find out the ratio of a to B

First question:
The ratio of 0.25 to 8 / 1 is equal to the ratio of X to 10
0.25:1/8=x:10
1/8x=0.25*10
0.125x=2.5
x=20
Second question:
A: B
=1/5:1/4
=4:5
The ratio is 4 / 5 = 4 / 5 or 0.8
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The ratio of 2 / 3 to 1 / 4 is equal to the ratio of a number to the sum of 5 / 4 and 3 / 8

2/3:1/4=x:(5/4+3/8)
2/3:1/4=x:13/8
1/4x=13/8×2/3
1/4x=13/12
x=13/3