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Finding the Fourth Proportional to 373,843.20, 515,896.88 and 212,694.78

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Solution

The fourth proportional to 373,843.20, 515,896.88 and 212,694.78 is: 293,514.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,843.20 : 515,896.88 = 212,694.78 : x
  2. Step 2: Convert to fraction form
    373,843.20/515,896.88 = 212,694.78/x
  3. Step 3: Cross multiply
    373,843.20x = 515,896.88 × 212,694.78
  4. Step 4: Simplify right side
    373,843.20x = 109,728,573,394.29
  5. Step 5: Solve for x
    x = 109,728,573,394.29/373,843.20
  6. Step 6: Final answer
    x = 293,514.96

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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.