(1)40/x=16/1.2
∴x=40×1.2÷16
x=3
(2)30/7=x/5
x=30×5÷7
x=150/7
(3)0.4:1/4=1/9:x
x=1/4×1/9÷0.4
x=5/72.
(4)14:0.7=x:0.6
x=14×0.6÷0.7
x=12.
(1)40/x=16/1.2
∴x=40×1.2÷16
x=3
(2)30/7=x/5
x=30×5÷7
x=150/7
(3)0.4:1/4=1/9:x
x=1/4×1/9÷0.4
x=5/72.
(4)14:0.7=x:0.6
x=14×0.6÷0.7
x=12.