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Finding the Fourth Proportional to 636,431.85, 878,057.42 and 394,627.41

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Solution

The fourth proportional to 636,431.85, 878,057.42 and 394,627.41 is: 544,450.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,431.85 : 878,057.42 = 394,627.41 : x
  2. Step 2: Convert to fraction form
    636,431.85/878,057.42 = 394,627.41/x
  3. Step 3: Cross multiply
    636,431.85x = 878,057.42 × 394,627.41
  4. Step 4: Simplify right side
    636,431.85x = 346,505,523,512.75
  5. Step 5: Solve for x
    x = 346,505,523,512.75/636,431.85
  6. Step 6: Final answer
    x = 544,450.32

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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.