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Finding the Third Proportional to 208,839 and 313,721

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Solution

The third proportional to 208,839 and 313,721 is: 471,276.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,839 : 313,721 = 313,721 : x
  2. Step 2: Convert to fraction form
    208,839/313,721 = 313,721/x
  3. Step 3: Cross multiply
    208,839x = 313,721 × 313,721
  4. Step 4: Simplify right side
    208,839x = 98,420,865,841
  5. Step 5: Solve for x
    x = 98,420,865,841/208,839
  6. Step 6: Final answer
    x = 471,276.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.