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Finding the Third Proportional to 279,356 and 432,471

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Solution

The third proportional to 279,356 and 432,471 is: 669,508.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,356 : 432,471 = 432,471 : x
  2. Step 2: Convert to fraction form
    279,356/432,471 = 432,471/x
  3. Step 3: Cross multiply
    279,356x = 432,471 × 432,471
  4. Step 4: Simplify right side
    279,356x = 187,031,165,841
  5. Step 5: Solve for x
    x = 187,031,165,841/279,356
  6. Step 6: Final answer
    x = 669,508.32

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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.