[tex]\displaystyle \frac{134,16}{31,2}=\frac{x}{0,4}\\ \\\frac{\frac{3354}{25} }{\frac{156}{5} }=\frac{x}{\frac{2}5} } \\ \\\\\frac{43}{10}=\frac{5x}{2}\\ \\86=50x\\ 50x=86\\ \\x=\frac{43}{25}=1\frac{18}{25}=1,72[/tex]