Finding the Third Proportional to 312 and 628.50
Calculator
Solution
The third proportional to 312 and 628.50 is: 1,266.06
Step by Step Solution
- Step 1: Write the proportion equation
312 : 628.50 = 628.50 : x - Step 2: Convert to fraction form
312/628.50 = 628.50/x - Step 3: Cross multiply
312x = 628.50 × 628.50 - Step 4: Simplify right side
312x = 395,012.25 - Step 5: Solve for x
x = 395,012.25/312 - Step 6: Final answer
x = 1,266.06
Related Problems
Find third proportional to 156 and 314.25
Half scale
Find third proportional to 624 and 1,257
Double scale
Find third proportional to 314 and 633
Similar ratio
Find third proportional to 468 and 942.75
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.01) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.