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Finding the Fourth Proportional to 242.97, 335.39 and 203.55

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Solution

The fourth proportional to 242.97, 335.39 and 203.55 is: 280.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.97 : 335.39 = 203.55 : x
  2. Step 2: Convert to fraction form
    242.97/335.39 = 203.55/x
  3. Step 3: Cross multiply
    242.97x = 335.39 × 203.55
  4. Step 4: Simplify right side
    242.97x = 68,267.62
  5. Step 5: Solve for x
    x = 68,267.62/242.97
  6. Step 6: Final answer
    x = 280.97

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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.