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Finding the Third Proportional to 100,386 and 198,234

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Solution

The third proportional to 100,386 and 198,234 is: 391,456.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,386 : 198,234 = 198,234 : x
  2. Step 2: Convert to fraction form
    100,386/198,234 = 198,234/x
  3. Step 3: Cross multiply
    100,386x = 198,234 × 198,234
  4. Step 4: Simplify right side
    100,386x = 39,296,718,756
  5. Step 5: Solve for x
    x = 39,296,718,756/100,386
  6. Step 6: Final answer
    x = 391,456.17

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.