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Finding the Third Proportional to 187,990.50 and 391,472.25

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Solution

The third proportional to 187,990.50 and 391,472.25 is: 815,203.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,990.50 : 391,472.25 = 391,472.25 : x
  2. Step 2: Convert to fraction form
    187,990.50/391,472.25 = 391,472.25/x
  3. Step 3: Cross multiply
    187,990.50x = 391,472.25 × 391,472.25
  4. Step 4: Simplify right side
    187,990.50x = 153,250,522,520.06
  5. Step 5: Solve for x
    x = 153,250,522,520.06/187,990.50
  6. Step 6: Final answer
    x = 815,203.55

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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.