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Finding the Third Proportional to 198,211.50 and 412,839

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Solution

The third proportional to 198,211.50 and 412,839 is: 859,869.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,211.50 : 412,839 = 412,839 : x
  2. Step 2: Convert to fraction form
    198,211.50/412,839 = 412,839/x
  3. Step 3: Cross multiply
    198,211.50x = 412,839 × 412,839
  4. Step 4: Simplify right side
    198,211.50x = 170,436,039,921
  5. Step 5: Solve for x
    x = 170,436,039,921/198,211.50
  6. Step 6: Final answer
    x = 859,869.58

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.