Question

The value of x in the proportion 1/2:2/3 = 3/4:x is

1
4/9
1 7/9
1/4

Answer 1

(1/2) / (2/3) = (3/4) / (x)
cross multiply
1/2x = (2/3)(3/4)
1/2x = 1/2
x = 1

check..
(1/2) / (2/3) = (3/4) / (1/1)
cross multiply
(1/2)(1/1) = (2/3)(3/4)
1/2 = 1/2 (correct)

so x = 1

Answer 2

Thank you!!!