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Finding the Third Proportional to 156,979 and 339,860

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Solution

The third proportional to 156,979 and 339,860 is: 735,797.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,979 : 339,860 = 339,860 : x
  2. Step 2: Convert to fraction form
    156,979/339,860 = 339,860/x
  3. Step 3: Cross multiply
    156,979x = 339,860 × 339,860
  4. Step 4: Simplify right side
    156,979x = 115,504,819,600
  5. Step 5: Solve for x
    x = 115,504,819,600/156,979
  6. Step 6: Final answer
    x = 735,797.91

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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.