To solve for \( n \) in the equation \( 54 = 30n \), you can isolate \( n \) by dividing both sides by 30:
\[ n = \frac{54}{30} \]
Now simplify \( \frac{54}{30} \):
\[ n = \frac{54 \div 6}{30 \div 6} = \frac{9}{5} = 1.8 \]
Thus, the value of \( n \) that will make the ratios equivalent is:
\[ \boxed{1.8} \]