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Finding the Fourth Proportional to 308.80, 462.68 and 186.90

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Solution

The fourth proportional to 308.80, 462.68 and 186.90 is: 280.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.80 : 462.68 = 186.90 : x
  2. Step 2: Convert to fraction form
    308.80/462.68 = 186.90/x
  3. Step 3: Cross multiply
    308.80x = 462.68 × 186.90
  4. Step 4: Simplify right side
    308.80x = 86,474.89
  5. Step 5: Solve for x
    x = 86,474.89/308.80
  6. Step 6: Final answer
    x = 280.04

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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.