Question 839629
For a triangle,
{{{A=(1/2)bh}}}
{{{726=(1/2)(3x)(4x)}}}
{{{1452=144x^2}}}
{{{x^2=10.083333}}}
From the Pythagorean theorem,
{{{(3x)^2+(4x)^2=H^2}}}
{{{9x^2+16x^2=H^2}}}
{{{H^2=25x^2=25(10.08333)}}}
{{{H^2=252.08333}}}
{{{H=15.877}}}