Question 1164575
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You want PB to be 1/3 of the total length of AB; that means P is 2/3 of the way from A to B.<br>
So, for each coordinate separately, find the value that is 2/3 of the way from the coordinate for A to the coordinate for B.<br>
For example, from A to B the x coordinate changes from 5 to 8, a change of 3. 2/3 of that change is 2, so the x coordinate of P is 5+2=7.<br>
Then do the same for the y and z coordinates.<br>