Let a = (x²+y²)/xy and b = √(x²+y²). Third proportional c = b²/a = [√(x²+y²)]² / [(x²+y²)/xy] = (x²+y²) * [xy/(x²+y²)] = xy.
मान लीजिए a = (x²+y²)/xy और b = √(x²+y²)। तृतीयानुपाती c = b²/a = [√(x²+y²)]² / [(x²+y²)/xy] = (x²+y²) * [xy/(x²+y²)] = xy।