\[\boxed{\text{5.398.}}\]
\[\textbf{а)}\ \frac{133}{900} > \frac{1}{9}\]
\[\frac{133}{900} > \frac{100}{900}\text{.\ }\]
\[\textbf{б)}\ \frac{289}{45\ 000} < \frac{1}{15}\]
\[\frac{289}{45\ 000} < \frac{3\ 000}{45\ 000}\text{.\ }\]
\[\textbf{в)}\ \frac{73}{1\ 080} > \frac{15}{540}\ \]
\[\frac{73}{1\ 080} > \frac{1}{36} = \frac{30}{1080}\text{.\ \ }\]