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Finding the Fourth Proportional to 308.82, 462.96 and 113.78

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Solution

The fourth proportional to 308.82, 462.96 and 113.78 is: 170.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.82 : 462.96 = 113.78 : x
  2. Step 2: Convert to fraction form
    308.82/462.96 = 113.78/x
  3. Step 3: Cross multiply
    308.82x = 462.96 × 113.78
  4. Step 4: Simplify right side
    308.82x = 52,675.59
  5. Step 5: Solve for x
    x = 52,675.59/308.82
  6. Step 6: Final answer
    x = 170.57

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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.