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Finding the Fourth Proportional to 243.13, 335.61 and 149.89

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Solution

The fourth proportional to 243.13, 335.61 and 149.89 is: 206.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.13 : 335.61 = 149.89 : x
  2. Step 2: Convert to fraction form
    243.13/335.61 = 149.89/x
  3. Step 3: Cross multiply
    243.13x = 335.61 × 149.89
  4. Step 4: Simplify right side
    243.13x = 50,304.58
  5. Step 5: Solve for x
    x = 50,304.58/243.13
  6. Step 6: Final answer
    x = 206.90

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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.