Question

Решите пропорцию 1 1/3:3/7=1.2:x

Answer 1

1 1/3*х=3/7*1,2
4/3*х=36/70
х=36/70:4/3
x=27/70

Answer 2

1 1/3 : 3/7 = 1,2 : х

4/3 : 3/7 = 12/10 : х

4/3 : 3/7 = 6/5 : х

4/3 * х = 3/7 * 6/5

4/3 * х = 18/35

х = 18/35 : 4/3

х = 18/35 * 3/4

х = 54/140

х = 27/ 70