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Finding the Third Proportional to 280,304 and 423,372

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Solution

The third proportional to 280,304 and 423,372 is: 639,462.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,304 : 423,372 = 423,372 : x
  2. Step 2: Convert to fraction form
    280,304/423,372 = 423,372/x
  3. Step 3: Cross multiply
    280,304x = 423,372 × 423,372
  4. Step 4: Simplify right side
    280,304x = 179,243,850,384
  5. Step 5: Solve for x
    x = 179,243,850,384/280,304
  6. Step 6: Final answer
    x = 639,462.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.