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Finding the Fourth Proportional to 372,149.16, 513,553.82 and 211,018.56

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Solution

The fourth proportional to 372,149.16, 513,553.82 and 211,018.56 is: 291,198.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,149.16 : 513,553.82 = 211,018.56 : x
  2. Step 2: Convert to fraction form
    372,149.16/513,553.82 = 211,018.56/x
  3. Step 3: Cross multiply
    372,149.16x = 513,553.82 × 211,018.56
  4. Step 4: Simplify right side
    372,149.16x = 108,369,387,578.90
  5. Step 5: Solve for x
    x = 108,369,387,578.90/372,149.16
  6. Step 6: Final answer
    x = 291,198.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.