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Finding the Fourth Proportional to 447,672.72, 671,734.20 and 279,149.52

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Solution

The fourth proportional to 447,672.72, 671,734.20 and 279,149.52 is: 418,864.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,672.72 : 671,734.20 = 279,149.52 : x
  2. Step 2: Convert to fraction form
    447,672.72/671,734.20 = 279,149.52/x
  3. Step 3: Cross multiply
    447,672.72x = 671,734.20 × 279,149.52
  4. Step 4: Simplify right side
    447,672.72x = 187,514,279,497.58
  5. Step 5: Solve for x
    x = 187,514,279,497.58/447,672.72
  6. Step 6: Final answer
    x = 418,864.66

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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.