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Finding the Fourth Proportional to 373,691.88, 515,694.87 and 212,578.20

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Solution

The fourth proportional to 373,691.88, 515,694.87 and 212,578.20 is: 293,357.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,691.88 : 515,694.87 = 212,578.20 : x
  2. Step 2: Convert to fraction form
    373,691.88/515,694.87 = 212,578.20/x
  3. Step 3: Cross multiply
    373,691.88x = 515,694.87 × 212,578.20
  4. Step 4: Simplify right side
    373,691.88x = 109,625,487,213.83
  5. Step 5: Solve for x
    x = 109,625,487,213.83/373,691.88
  6. Step 6: Final answer
    x = 293,357.96

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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.