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Finding the Fourth Proportional to 308.97, 462.90 and 146.43

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Solution

The fourth proportional to 308.97, 462.90 and 146.43 is: 219.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.97 : 462.90 = 146.43 : x
  2. Step 2: Convert to fraction form
    308.97/462.90 = 146.43/x
  3. Step 3: Cross multiply
    308.97x = 462.90 × 146.43
  4. Step 4: Simplify right side
    308.97x = 67,782.45
  5. Step 5: Solve for x
    x = 67,782.45/308.97
  6. Step 6: Final answer
    x = 219.38

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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.