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Finding the Fourth Proportional to 242.70, 334.89 and 149.52

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Solution

The fourth proportional to 242.70, 334.89 and 149.52 is: 206.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.70 : 334.89 = 149.52 : x
  2. Step 2: Convert to fraction form
    242.70/334.89 = 149.52/x
  3. Step 3: Cross multiply
    242.70x = 334.89 × 149.52
  4. Step 4: Simplify right side
    242.70x = 50,072.75
  5. Step 5: Solve for x
    x = 50,072.75/242.70
  6. Step 6: Final answer
    x = 206.32

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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.