Solving for Center of Mass: Equation and Explanation for 2 and 3 Masses

[AngelsMind]

I'm having trouble finding the equation to find the center of mass between 2 masses. I'm guessing it's something like add the masses and find a ratio between them and apply it to the distance between their own center of masses but I'm not sure. can someone give me the equation and an explanation for each variable? Also what would you do to find the center of mass for 3 individual masses.

 

[CraigD]

Check this site http://www.ottisoft.com/samplact/Center%20of%20mass.htm

CraigD, AMInstP
www.cymek.com

 

[AngelsMind]

thanks a lot