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Finding the Fourth Proportional to 636,691.86, 878,136.84 and 394,837.74

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Solution

The fourth proportional to 636,691.86, 878,136.84 and 394,837.74 is: 544,567.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,691.86 : 878,136.84 = 394,837.74 : x
  2. Step 2: Convert to fraction form
    636,691.86/878,136.84 = 394,837.74/x
  3. Step 3: Cross multiply
    636,691.86x = 878,136.84 × 394,837.74
  4. Step 4: Simplify right side
    636,691.86x = 346,721,565,316.34
  5. Step 5: Solve for x
    x = 346,721,565,316.34/636,691.86
  6. Step 6: Final answer
    x = 544,567.30

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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.