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Finding the Fourth Proportional to 411.55, 617.38 and 151.49

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Solution

The fourth proportional to 411.55, 617.38 and 151.49 is: 227.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.55 : 617.38 = 151.49 : x
  2. Step 2: Convert to fraction form
    411.55/617.38 = 151.49/x
  3. Step 3: Cross multiply
    411.55x = 617.38 × 151.49
  4. Step 4: Simplify right side
    411.55x = 93,526.90
  5. Step 5: Solve for x
    x = 93,526.90/411.55
  6. Step 6: Final answer
    x = 227.26

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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.