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Finding the Third Proportional to 156,939 and 339,949

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Solution

The third proportional to 156,939 and 339,949 is: 736,370.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,939 : 339,949 = 339,949 : x
  2. Step 2: Convert to fraction form
    156,939/339,949 = 339,949/x
  3. Step 3: Cross multiply
    156,939x = 339,949 × 339,949
  4. Step 4: Simplify right side
    156,939x = 115,565,322,601
  5. Step 5: Solve for x
    x = 115,565,322,601/156,939
  6. Step 6: Final answer
    x = 736,370.96

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.