Home / 225-561

Finding the Third Proportional to 225 and 561

Calculator

Solution

The third proportional to 225 and 561 is: 1,398.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    225 : 561 = 561 : x
  2. Step 2: Convert to fraction form
    225/561 = 561/x
  3. Step 3: Cross multiply
    225x = 561 × 561
  4. Step 4: Simplify right side
    225x = 314,721
  5. Step 5: Solve for x
    x = 314,721/225
  6. Step 6: Final answer
    x = 1,398.76

Related Problems

Find third proportional to 112.50 and 280.50
Half scale
Find third proportional to 450 and 1,122
Double scale
Find third proportional to 227 and 566
Similar ratio
Find third proportional to 337.50 and 841.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.