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Finding the Fourth Proportional to 242.39, 334.43 and 168.78

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Solution

The fourth proportional to 242.39, 334.43 and 168.78 is: 232.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.39 : 334.43 = 168.78 : x
  2. Step 2: Convert to fraction form
    242.39/334.43 = 168.78/x
  3. Step 3: Cross multiply
    242.39x = 334.43 × 168.78
  4. Step 4: Simplify right side
    242.39x = 56,446.14
  5. Step 5: Solve for x
    x = 56,446.14/242.39
  6. Step 6: Final answer
    x = 232.87

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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.