Question

find x , if 9 , x , x , 64 are in proportion

Answer 1

9:x::x:64
x×x= 64 ×9
x^2= 576
$x = \sqrt{576}$
x=24
Hope it help you friend☺

Answer 2

9:x::x:64
x×x= 64 ×9
x^2= 576
x=576x = \sqrt{576}x=√​576​​​ 
x=24