Why Is Vertical Resolution Monitor Resolution so Often a Multiple of 360?

Stare at a list of monitor resolutions long enough and you might notice a pattern: many of the vertical resolutions, especially those of gaming or multimedia displays, are multiples of 360 (720, 1080, 1440, etc. via Pocket http://www.howtogeek.com/174309/why-is-vertical-resolution-monitor-resolution-so-often-a-multiple-of-360/