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Finding the Fourth Proportional to 424.20, 585.40 and 249.56

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Solution

The fourth proportional to 424.20, 585.40 and 249.56 is: 344.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.20 : 585.40 = 249.56 : x
  2. Step 2: Convert to fraction form
    424.20/585.40 = 249.56/x
  3. Step 3: Cross multiply
    424.20x = 585.40 × 249.56
  4. Step 4: Simplify right side
    424.20x = 146,092.42
  5. Step 5: Solve for x
    x = 146,092.42/424.20
  6. Step 6: Final answer
    x = 344.40

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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.