If \( p^{2}+a^{2}: q^{2}+b^{2}=a p: b q \), shew that \( p, q, a, b \) are in proportion.
If \( p^{2}+a^{2}: q^{2}+b^{2}=a p: b q \), shew that \( p, q, a, b \) are in proportion.
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