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Finding the Fourth Proportional to 243.55, 365.39 and 106.57

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Solution

The fourth proportional to 243.55, 365.39 and 106.57 is: 159.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.55 : 365.39 = 106.57 : x
  2. Step 2: Convert to fraction form
    243.55/365.39 = 106.57/x
  3. Step 3: Cross multiply
    243.55x = 365.39 × 106.57
  4. Step 4: Simplify right side
    243.55x = 38,939.61
  5. Step 5: Solve for x
    x = 38,939.61/243.55
  6. Step 6: Final answer
    x = 159.88

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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.