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Finding the Third Proportional to 442,859 and 687,617

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Solution

The third proportional to 442,859 and 687,617 is: 1,067,647.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,859 : 687,617 = 687,617 : x
  2. Step 2: Convert to fraction form
    442,859/687,617 = 687,617/x
  3. Step 3: Cross multiply
    442,859x = 687,617 × 687,617
  4. Step 4: Simplify right side
    442,859x = 472,817,138,689
  5. Step 5: Solve for x
    x = 472,817,138,689/442,859
  6. Step 6: Final answer
    x = 1,067,647.13

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.