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Finding the Fourth Proportional to 242.97, 335.38 and 149.72

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Solution

The fourth proportional to 242.97, 335.38 and 149.72 is: 206.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.97 : 335.38 = 149.72 : x
  2. Step 2: Convert to fraction form
    242.97/335.38 = 149.72/x
  3. Step 3: Cross multiply
    242.97x = 335.38 × 149.72
  4. Step 4: Simplify right side
    242.97x = 50,211.42
  5. Step 5: Solve for x
    x = 50,211.42/242.97
  6. Step 6: Final answer
    x = 206.66

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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.