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Finding the Fourth Proportional to 242.44, 334.61 and 138.94

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Solution

The fourth proportional to 242.44, 334.61 and 138.94 is: 191.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.44 : 334.61 = 138.94 : x
  2. Step 2: Convert to fraction form
    242.44/334.61 = 138.94/x
  3. Step 3: Cross multiply
    242.44x = 334.61 × 138.94
  4. Step 4: Simplify right side
    242.44x = 46,489.70
  5. Step 5: Solve for x
    x = 46,489.70/242.44
  6. Step 6: Final answer
    x = 191.76

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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.