设还要x小时到达乙站,有比例:
5/8:4.5=(1-5/8):x
5/8:9/2=3/8:x
(5/8)x=9/2×3/8
(5/8)x=27/16
x=27/16÷5/8
x=27/16×8/5
x=2.7
答:照这样还要2.7小时到达乙站.