The ratio of 4.5 to X is equal to the ratio of 9 to 0.4

The ratio of 4.5 to X is equal to the ratio of 9 to 0.4

The two external terms are 5 and 32, and the two internal terms are 8 and (20)
8x=5*32
8x=160
x=160÷8
x=20
The ratio of 4.5 to (0.2) is equal to the ratio of 9 to 0.4
4.5：x=9：0.4
9x=4.5*0.4
9x=1.8
x=0.2
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(1) (2) the ratio of 1 / 2 to 6 / 7 is equal to the ratio of X to 1 / 4
List the proportion according to the condition and solve the proportion

(1) The two internal terms are 10 and 6, and the two external terms are x and 12
x:10=6:12
12x=60
x=5
(2) The ratio of 1 / 2 to 6 / 7 is equal to the ratio of X to 1 / 4
1/2:6/7=x:1/4
6x/7=1/8
x=7/48

The proportions are listed according to the following conditions, and the two external terms of solving the proportions of 5 and 16 equal to the ratio of 30 to X are 2 and 2.5 respectively, and the two internal terms are 3 respectively

5：16=30：X
5X=16*30
5X=480
X=96
5：16=30：96
3X=2*2.5
3X=5
X=5/3