“等比定理”的证明方法是:因为所给连等条件a/b=c/d=e/f=…实质就是a/b,c/d,e/f,…这些比的比值相等,所以可设这个比值为k,就可以将连等条件变成a=bk,c=dk,e=fk,…等多个等式加以运用,可使问题顺利解决.这种解题方法可称为“比值法”,其应用颇为广泛. The proof method for the “equal ratio theorem” is: because the given condition a/b=c/d=e/f=... is essentially the ratio of a/b, c/d, e/f,..., these ratios are equal. Therefore, we can set this ratio to k, and we can use the equality conditions such as a=bk, c=dk, e=fk,..., etc., to apply the equations, so that the problem can be resolved smoothly. This problem solving method can be called For the “ratio method”, its application is quite extensive.