Question 120667
7 is to 10 as x is to 200

{{{7/10=x/200}}}
{{{20*7=x}}} (Multiply both sides by 200, divide 200 by 10)
{{{140=x}}}

Or, consider the fact that there is a {{{7/10=70}}}% success rate. If this rate continues, we would expect {{{.7*200=140}}}.