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Finding the Fourth Proportional to 308.63, 463.17 and 146.31

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Solution

The fourth proportional to 308.63, 463.17 and 146.31 is: 219.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.63 : 463.17 = 146.31 : x
  2. Step 2: Convert to fraction form
    308.63/463.17 = 146.31/x
  3. Step 3: Cross multiply
    308.63x = 463.17 × 146.31
  4. Step 4: Simplify right side
    308.63x = 67,765.09
  5. Step 5: Solve for x
    x = 67,765.09/308.63
  6. Step 6: Final answer
    x = 219.57

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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.