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Finding the Fourth Proportional to 424.52, 636.80 and 308.42

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Solution

The fourth proportional to 424.52, 636.80 and 308.42 is: 462.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.52 : 636.80 = 308.42 : x
  2. Step 2: Convert to fraction form
    424.52/636.80 = 308.42/x
  3. Step 3: Cross multiply
    424.52x = 636.80 × 308.42
  4. Step 4: Simplify right side
    424.52x = 196,397.13
  5. Step 5: Solve for x
    x = 196,397.13/424.52
  6. Step 6: Final answer
    x = 462.64

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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.