Question

If 0.75 : x :: 5 : 8, then x is equal to:

Answer 1

it is a proportion
extremes is equal to the mean
a:b::c:d
a*d=b*c
0.75*8=5*x
6=5x
x=6/5
therefore x is equal to 6/5

Answer 2

0.75 : x :: 5 : 8

→0.75/x = 5/8

→0.75×8 = 5x

→5x = 6

→ x = 6/5

→ x = 1.2

Hope it helps