Larry K. answered 05/23/19
Retired Professional Loves Tutoring Math
You complete a ratio table by continuing to multiply the ratio (here it is 168 hours per week) by the next positive integer (in this example it is 3 weeks). so 168 x 3 = 504.
The following entry would be 168 x 4 = 672.
Note that the number of hours for 2 weeks in the example is a misprint. It should be 168 x 2 = 336. (not 1176. that should be the entry for 7 weeks).