Chapter 1 - Foundations for Algebra - 1-3 Real Numbers and the Number Line - Practice and Problem-Solving Exercises - Page 20: 39

$\frac{4}{3} < \sqrt 2$

First, we write the fraction as a decimal: $\frac{4}{3}\approx1.333$ Next, we write the square root as a decimal: $\sqrt 2\approx1.414$ Since $1.333$ is less than $1.414$, we write the comparison as $\frac{4}{3} < \sqrt 2$.