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Finding the Fourth Proportional to 636,691.36, 878,136.15 and 394,837.24

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Solution

The fourth proportional to 636,691.36, 878,136.15 and 394,837.24 is: 544,566.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,691.36 : 878,136.15 = 394,837.24 : x
  2. Step 2: Convert to fraction form
    636,691.36/878,136.15 = 394,837.24/x
  3. Step 3: Cross multiply
    636,691.36x = 878,136.15 × 394,837.24
  4. Step 4: Simplify right side
    636,691.36x = 346,720,853,810.23
  5. Step 5: Solve for x
    x = 346,720,853,810.23/636,691.36
  6. Step 6: Final answer
    x = 544,566.61

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1.5x scale

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.