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Finding the Fourth Proportional to 414.88, 572.40 and 249.12

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Solution

The fourth proportional to 414.88, 572.40 and 249.12 is: 343.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.88 : 572.40 = 249.12 : x
  2. Step 2: Convert to fraction form
    414.88/572.40 = 249.12/x
  3. Step 3: Cross multiply
    414.88x = 572.40 × 249.12
  4. Step 4: Simplify right side
    414.88x = 142,596.29
  5. Step 5: Solve for x
    x = 142,596.29/414.88
  6. Step 6: Final answer
    x = 343.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.