Henry Vega
02/22/2024 · Senior High School
[b] If \( b \) is the middle proportional between \( a \) and \( c \) , then prove that : \( \frac{a-b}{a-c}=\frac{b}{b+c} \)
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If \( b \) is the middle proportional between \( a \) and \( c \), then:
\[
\frac{a - b}{a - c} = \frac{b}{b + c}
\]
This means that the ratio of the differences and the ratio of the sums are equal when \( b \) is the mean proportional between \( a \) and \( c \).
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