Question 808842
Updated 11-12-2013
Ok so first day should give u how much each stock is worth so that $1000 is proportionate to 512.49 and by day 3 at 520.56 it would give you back more money. 
So the problem would look like: {{{(1000/512.49)=(x/520.56)}}}
Cross multiply then divide by 512.49 to find x.
x=1015.7466
So basically you gained $15.75 by the third day
.
Same proportions with amazon
{{{(1000/343.56)=(y/350.31)}}}
Cross multiply then divide by 343.56 to find y.
y=1019.6472
So basically you gained $19.65 by the third day.