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Finding the Fourth Proportional to 308.68, 463.20 and 171.70

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Solution

The fourth proportional to 308.68, 463.20 and 171.70 is: 257.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.68 : 463.20 = 171.70 : x
  2. Step 2: Convert to fraction form
    308.68/463.20 = 171.70/x
  3. Step 3: Cross multiply
    308.68x = 463.20 × 171.70
  4. Step 4: Simplify right side
    308.68x = 79,531.44
  5. Step 5: Solve for x
    x = 79,531.44/308.68
  6. Step 6: Final answer
    x = 257.65

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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.