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Finding the Third Proportional to 508,721 and 809,782

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Solution

The third proportional to 508,721 and 809,782 is: 1,289,010.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,721 : 809,782 = 809,782 : x
  2. Step 2: Convert to fraction form
    508,721/809,782 = 809,782/x
  3. Step 3: Cross multiply
    508,721x = 809,782 × 809,782
  4. Step 4: Simplify right side
    508,721x = 655,746,887,524
  5. Step 5: Solve for x
    x = 655,746,887,524/508,721
  6. Step 6: Final answer
    x = 1,289,010.85

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.