If x:y=2:1x:y = 2:1x:y=2:1 and , then
Equalizing yyy (L.C.M. of 111 and 222 is 222) gives x:y=4:2x:y=4:2x:y=4:2 and y:z=2:1y:z=2:1y:z=2:1. Thus x:y:z=4:2:1x:y:z=4:2:1x:y:z=4:2:1.