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Finding the Third Proportional to 217,147 and 478,467

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Solution

The third proportional to 217,147 and 478,467 is: 1,054,265.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,147 : 478,467 = 478,467 : x
  2. Step 2: Convert to fraction form
    217,147/478,467 = 478,467/x
  3. Step 3: Cross multiply
    217,147x = 478,467 × 478,467
  4. Step 4: Simplify right side
    217,147x = 228,930,670,089
  5. Step 5: Solve for x
    x = 228,930,670,089/217,147
  6. Step 6: Final answer
    x = 1,054,265.87

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.