[tex] \frac{x}{3 \sqrt{3} } = \frac{5 \sqrt{5} }{8 \sqrt{15} } \\ \\ \frac{ \sqrt{3}x }{9} = \frac{5}{8 \sqrt{3} } \\ \\ \frac{ \sqrt{3}x }{9} = \frac{5 \sqrt{3} }{24} \\ \\ 24 \sqrt{3}x = 45 \sqrt{3} \\ \\ 24 \sqrt{3}x : (3 \sqrt{3}) = 45 \sqrt{3} : (3 \sqrt{3}) \\ \\ 8x = 15 \\ \\ 8x : 8 = 15 : 8 \\ \\ x = \frac{15}{8} [/tex]
