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Finding the Third Proportional to 103,289 and 218,979

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Solution

The third proportional to 103,289 and 218,979 is: 464,248.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,289 : 218,979 = 218,979 : x
  2. Step 2: Convert to fraction form
    103,289/218,979 = 218,979/x
  3. Step 3: Cross multiply
    103,289x = 218,979 × 218,979
  4. Step 4: Simplify right side
    103,289x = 47,951,802,441
  5. Step 5: Solve for x
    x = 47,951,802,441/103,289
  6. Step 6: Final answer
    x = 464,248.88

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.