Finding the Third Proportional to 725 and 1,387
Calculator
Solution
The third proportional to 725 and 1,387 is: 2,653.47
Step by Step Solution
- Step 1: Write the proportion equation
725 : 1,387 = 1,387 : x - Step 2: Convert to fraction form
725/1,387 = 1,387/x - Step 3: Cross multiply
725x = 1,387 × 1,387 - Step 4: Simplify right side
725x = 1,923,769 - Step 5: Solve for x
x = 1,923,769/725 - Step 6: Final answer
x = 2,653.47
Related Problems
Find third proportional to 362.50 and 693.50
Half scale
Find third proportional to 1,450 and 2,774
Double scale
Find third proportional to 727 and 1,391
Similar ratio
Find third proportional to 1,087.50 and 2,080.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.