Answer
{$\frac{e^{1.6}}{3}$}, {$1.6510$}
Work Step by Step
Step 1: $\ln 3x=1.6$
Step 2: $3x=e^{1.6}$
Step 3: $x=\frac{e^{1.6}}{3}\approx1.6510$
Therefore, the exact solution is {$\frac{e^{1.6}}{3}$}. The answer, to four decimal places, is {$1.6510$}.