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Finding the Fourth Proportional to 447.24, 617.49 and 279.26

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Solution

The fourth proportional to 447.24, 617.49 and 279.26 is: 385.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.24 : 617.49 = 279.26 : x
  2. Step 2: Convert to fraction form
    447.24/617.49 = 279.26/x
  3. Step 3: Cross multiply
    447.24x = 617.49 × 279.26
  4. Step 4: Simplify right side
    447.24x = 172,435.77
  5. Step 5: Solve for x
    x = 172,435.77/447.24
  6. Step 6: Final answer
    x = 385.56

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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.