Home / 561-817

Finding the Third Proportional to 561 and 817

Calculator

Solution

The third proportional to 561 and 817 is: 1,189.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    561 : 817 = 817 : x
  2. Step 2: Convert to fraction form
    561/817 = 817/x
  3. Step 3: Cross multiply
    561x = 817 × 817
  4. Step 4: Simplify right side
    561x = 667,489
  5. Step 5: Solve for x
    x = 667,489/561
  6. Step 6: Final answer
    x = 1,189.82

Related Problems

Find third proportional to 280.50 and 408.50
Half scale
Find third proportional to 1,122 and 1,634
Double scale
Find third proportional to 563 and 820
Similar ratio
Find third proportional to 841.50 and 1,225.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.