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Finding the Fourth Proportional to 243.97, 366.15 and 99.79

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Solution

The fourth proportional to 243.97, 366.15 and 99.79 is: 149.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.97 : 366.15 = 99.79 : x
  2. Step 2: Convert to fraction form
    243.97/366.15 = 99.79/x
  3. Step 3: Cross multiply
    243.97x = 366.15 × 99.79
  4. Step 4: Simplify right side
    243.97x = 36,538.11
  5. Step 5: Solve for x
    x = 36,538.11/243.97
  6. Step 6: Final answer
    x = 149.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.