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Finding the Third Proportional to 128,394 and 278,468

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Solution

The third proportional to 128,394 and 278,468 is: 603,956.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,394 : 278,468 = 278,468 : x
  2. Step 2: Convert to fraction form
    128,394/278,468 = 278,468/x
  3. Step 3: Cross multiply
    128,394x = 278,468 × 278,468
  4. Step 4: Simplify right side
    128,394x = 77,544,427,024
  5. Step 5: Solve for x
    x = 77,544,427,024/128,394
  6. Step 6: Final answer
    x = 603,956.78

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.