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Finding the Fourth Proportional to 308.28, 425.25 and 203.43

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Solution

The fourth proportional to 308.28, 425.25 and 203.43 is: 280.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.28 : 425.25 = 203.43 : x
  2. Step 2: Convert to fraction form
    308.28/425.25 = 203.43/x
  3. Step 3: Cross multiply
    308.28x = 425.25 × 203.43
  4. Step 4: Simplify right side
    308.28x = 86,508.61
  5. Step 5: Solve for x
    x = 86,508.61/308.28
  6. Step 6: Final answer
    x = 280.62

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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.