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Finding the Fourth Proportional to 424.19, 636.28 and 248.54

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Solution

The fourth proportional to 424.19, 636.28 and 248.54 is: 372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.19 : 636.28 = 248.54 : x
  2. Step 2: Convert to fraction form
    424.19/636.28 = 248.54/x
  3. Step 3: Cross multiply
    424.19x = 636.28 × 248.54
  4. Step 4: Simplify right side
    424.19x = 158,143.30
  5. Step 5: Solve for x
    x = 158,143.30/424.19
  6. Step 6: Final answer
    x = 372.82

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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.