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Finding the Fourth Proportional to 636,449.88, 878,082.24 and 394,645.44

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Solution

The fourth proportional to 636,449.88, 878,082.24 and 394,645.44 is: 544,475.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,449.88 : 878,082.24 = 394,645.44 : x
  2. Step 2: Convert to fraction form
    636,449.88/878,082.24 = 394,645.44/x
  3. Step 3: Cross multiply
    636,449.88x = 878,082.24 × 394,645.44
  4. Step 4: Simplify right side
    636,449.88x = 346,531,151,960.99
  5. Step 5: Solve for x
    x = 346,531,151,960.99/636,449.88
  6. Step 6: Final answer
    x = 544,475.16

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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.