1 1/2 : 2 2/3 : 3 3/4 =

1 1/3 : 2 2/3 : 3 3/4
= 3/2 : 8/3 : 15/4
= 3/2 X 3/8 : 15/4
= 24/6 X 4/15
= 360/90
=4

semoga benar