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Finding the Fourth Proportional to 411.26, 617.49 and 238.10

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Solution

The fourth proportional to 411.26, 617.49 and 238.10 is: 357.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.26 : 617.49 = 238.10 : x
  2. Step 2: Convert to fraction form
    411.26/617.49 = 238.10/x
  3. Step 3: Cross multiply
    411.26x = 617.49 × 238.10
  4. Step 4: Simplify right side
    411.26x = 147,021.28
  5. Step 5: Solve for x
    x = 147,021.28/411.26
  6. Step 6: Final answer
    x = 357.49

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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.