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Finding the Third Proportional to 166,990 and 339,811

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Solution

The third proportional to 166,990 and 339,811 is: 691,487.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,990 : 339,811 = 339,811 : x
  2. Step 2: Convert to fraction form
    166,990/339,811 = 339,811/x
  3. Step 3: Cross multiply
    166,990x = 339,811 × 339,811
  4. Step 4: Simplify right side
    166,990x = 115,471,515,721
  5. Step 5: Solve for x
    x = 115,471,515,721/166,990
  6. Step 6: Final answer
    x = 691,487.61

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.