Finding the Third Proportional to 561 and 1,521
Calculator
Solution
The third proportional to 561 and 1,521 is: 4,123.78
Step by Step Solution
- Step 1: Write the proportion equation
561 : 1,521 = 1,521 : x - Step 2: Convert to fraction form
561/1,521 = 1,521/x - Step 3: Cross multiply
561x = 1,521 × 1,521 - Step 4: Simplify right side
561x = 2,313,441 - Step 5: Solve for x
x = 2,313,441/561 - Step 6: Final answer
x = 4,123.78
Related Problems
Find third proportional to 280.50 and 760.50
Half scale
Find third proportional to 1,122 and 3,042
Double scale
Find third proportional to 563 and 1,526
Similar ratio
Find third proportional to 841.50 and 2,281.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.