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Finding the Fourth Proportional to 411.54, 617.91 and 354.13

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Solution

The fourth proportional to 411.54, 617.91 and 354.13 is: 531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.54 : 617.91 = 354.13 : x
  2. Step 2: Convert to fraction form
    411.54/617.91 = 354.13/x
  3. Step 3: Cross multiply
    411.54x = 617.91 × 354.13
  4. Step 4: Simplify right side
    411.54x = 218,819.59
  5. Step 5: Solve for x
    x = 218,819.59/411.54
  6. Step 6: Final answer
    x = 531.71

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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.