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Finding the Fourth Proportional to 308.43, 425.22 and 242.11

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Solution

The fourth proportional to 308.43, 425.22 and 242.11 is: 333.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.43 : 425.22 = 242.11 : x
  2. Step 2: Convert to fraction form
    308.43/425.22 = 242.11/x
  3. Step 3: Cross multiply
    308.43x = 425.22 × 242.11
  4. Step 4: Simplify right side
    308.43x = 102,949.64
  5. Step 5: Solve for x
    x = 102,949.64/308.43
  6. Step 6: Final answer
    x = 333.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.