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Finding the Fourth Proportional to 243.87, 365.57 and 99.48

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Solution

The fourth proportional to 243.87, 365.57 and 99.48 is: 149.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.87 : 365.57 = 99.48 : x
  2. Step 2: Convert to fraction form
    243.87/365.57 = 99.48/x
  3. Step 3: Cross multiply
    243.87x = 365.57 × 99.48
  4. Step 4: Simplify right side
    243.87x = 36,366.41
  5. Step 5: Solve for x
    x = 36,366.41/243.87
  6. Step 6: Final answer
    x = 149.12

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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.