VirtualBox: Getting 16x9 resolution in Guest OS

My Host system is Ubuntu 16.04.3.  In VirtualBox I could not get the 16x9 ratio on my Windows 7 guest display.  To fix that;

I. Install Guest Add On for Virtualbox

1. Power on virtual machine
2. Click DEVICES on the VirtualBox Menu at the top of the screen
3. Click "Install Guest Additions CD Image..."
4. Follow the on-screen prompts.
5. Restart the virtual machine

II. Once restarted go to FILE on the VirtualBox Menu at the top of the screen.

III. Select PREFERENCES

IV. Select DISPLAY

V. Set MAXIMUM GUEST SCREEN DISPLAY to HINT

VI. Set the WIDTH and HEIGHT boxes to the resolution you want

VI. Restart your virtual machine.