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Finding the Fourth Proportional to 479.24, 717.87 and 387.44

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Solution

The fourth proportional to 479.24, 717.87 and 387.44 is: 580.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.24 : 717.87 = 387.44 : x
  2. Step 2: Convert to fraction form
    479.24/717.87 = 387.44/x
  3. Step 3: Cross multiply
    479.24x = 717.87 × 387.44
  4. Step 4: Simplify right side
    479.24x = 278,131.55
  5. Step 5: Solve for x
    x = 278,131.55/479.24
  6. Step 6: Final answer
    x = 580.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.