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Finding the Fourth Proportional to 447.53, 617.42 and 279.41

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Solution

The fourth proportional to 447.53, 617.42 and 279.41 is: 385.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.53 : 617.42 = 279.41 : x
  2. Step 2: Convert to fraction form
    447.53/617.42 = 279.41/x
  3. Step 3: Cross multiply
    447.53x = 617.42 × 279.41
  4. Step 4: Simplify right side
    447.53x = 172,508.84
  5. Step 5: Solve for x
    x = 172,508.84/447.53
  6. Step 6: Final answer
    x = 385.47

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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.