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Finding the Fourth Proportional to 636,434.22, 878,310.78 and 394,794.63

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Solution

The fourth proportional to 636,434.22, 878,310.78 and 394,794.63 is: 544,836.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,434.22 : 878,310.78 = 394,794.63 : x
  2. Step 2: Convert to fraction form
    636,434.22/878,310.78 = 394,794.63/x
  3. Step 3: Cross multiply
    636,434.22x = 878,310.78 × 394,794.63
  4. Step 4: Simplify right side
    636,434.22x = 346,752,379,415.11
  5. Step 5: Solve for x
    x = 346,752,379,415.11/636,434.22
  6. Step 6: Final answer
    x = 544,836.16

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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.