解比例(1)27﹕X=4.5﹕6 (2)17﹕12=7﹕X (3)1.3﹕18=X﹕3.6

问题描述:

解比例(1)27﹕X=4.5﹕6 (2)17﹕12=7﹕X (3)1.3﹕18=X﹕3.6

(1)x=36
(2)x=4.941176
(3)x=0.26

(1)x=27*6/4.5=36
(2)x=7*12/17=84/17
(3)x=1.3*3.6/18=0.26