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Finding the Fourth Proportional to 408.75, 613.17 and 226.19

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Solution

The fourth proportional to 408.75, 613.17 and 226.19 is: 339.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.75 : 613.17 = 226.19 : x
  2. Step 2: Convert to fraction form
    408.75/613.17 = 226.19/x
  3. Step 3: Cross multiply
    408.75x = 613.17 × 226.19
  4. Step 4: Simplify right side
    408.75x = 138,694.46
  5. Step 5: Solve for x
    x = 138,694.46/408.75
  6. Step 6: Final answer
    x = 339.32

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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.