Answer:
x = 1
Step-by-step explanation:
Given
[tex]\frac{1}{2}[/tex] : [tex]\frac{2}{3}[/tex] = [tex]\frac{3}{4}[/tex] : x
Multiply all parts by 12 to clear the fractions
6 : 8 = 9 : 12x , simplifying
3 : 4 = 3 : 4x
Thus
4x = 4 ( divide both sides by 4 )
x = 1
