是10,6,4.8,0.4,1/2(=0.5)这五个数话。6×0.4=4.8×0.5,比例有:6:4.8=1/2:0.4,6:1/2=4.8:0.4,4.8:6=0.4:1/2 ,1/2:6=0.4:4.8,