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Finding the Fourth Proportional to 308.71, 462.54 and 221.88

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Solution

The fourth proportional to 308.71, 462.54 and 221.88 is: 332.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.71 : 462.54 = 221.88 : x
  2. Step 2: Convert to fraction form
    308.71/462.54 = 221.88/x
  3. Step 3: Cross multiply
    308.71x = 462.54 × 221.88
  4. Step 4: Simplify right side
    308.71x = 102,628.38
  5. Step 5: Solve for x
    x = 102,628.38/308.71
  6. Step 6: Final answer
    x = 332.44

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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.