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Finding the Fourth Proportional to 308.52, 462.78 and 272.70

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Solution

The fourth proportional to 308.52, 462.78 and 272.70 is: 409.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.52 : 462.78 = 272.70 : x
  2. Step 2: Convert to fraction form
    308.52/462.78 = 272.70/x
  3. Step 3: Cross multiply
    308.52x = 462.78 × 272.70
  4. Step 4: Simplify right side
    308.52x = 126,200.11
  5. Step 5: Solve for x
    x = 126,200.11/308.52
  6. Step 6: Final answer
    x = 409.05

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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.