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Finding the Third Proportional to 221,718 and 338,115

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Solution

The third proportional to 221,718 and 338,115 is: 515,617.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,718 : 338,115 = 338,115 : x
  2. Step 2: Convert to fraction form
    221,718/338,115 = 338,115/x
  3. Step 3: Cross multiply
    221,718x = 338,115 × 338,115
  4. Step 4: Simplify right side
    221,718x = 114,321,753,225
  5. Step 5: Solve for x
    x = 114,321,753,225/221,718
  6. Step 6: Final answer
    x = 515,617.83

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.