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Finding the Third Proportional to 339,780 and 475,287

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Solution

The third proportional to 339,780 and 475,287 is: 664,835.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,780 : 475,287 = 475,287 : x
  2. Step 2: Convert to fraction form
    339,780/475,287 = 475,287/x
  3. Step 3: Cross multiply
    339,780x = 475,287 × 475,287
  4. Step 4: Simplify right side
    339,780x = 225,897,732,369
  5. Step 5: Solve for x
    x = 225,897,732,369/339,780
  6. Step 6: Final answer
    x = 664,835.28

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.