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Finding the Third Proportional to 156,977 and 339,856

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Solution

The third proportional to 156,977 and 339,856 is: 735,789.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,977 : 339,856 = 339,856 : x
  2. Step 2: Convert to fraction form
    156,977/339,856 = 339,856/x
  3. Step 3: Cross multiply
    156,977x = 339,856 × 339,856
  4. Step 4: Simplify right side
    156,977x = 115,502,100,736
  5. Step 5: Solve for x
    x = 115,502,100,736/156,977
  6. Step 6: Final answer
    x = 735,789.96

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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.