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Finding the Third Proportional to 101,815 and 218,698

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Solution

The third proportional to 101,815 and 218,698 is: 469,761.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,815 : 218,698 = 218,698 : x
  2. Step 2: Convert to fraction form
    101,815/218,698 = 218,698/x
  3. Step 3: Cross multiply
    101,815x = 218,698 × 218,698
  4. Step 4: Simplify right side
    101,815x = 47,828,815,204
  5. Step 5: Solve for x
    x = 47,828,815,204/101,815
  6. Step 6: Final answer
    x = 469,761.97

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.