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Finding the Fourth Proportional to 243.86, 366.50 and 115.70

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Solution

The fourth proportional to 243.86, 366.50 and 115.70 is: 173.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.86 : 366.50 = 115.70 : x
  2. Step 2: Convert to fraction form
    243.86/366.50 = 115.70/x
  3. Step 3: Cross multiply
    243.86x = 366.50 × 115.70
  4. Step 4: Simplify right side
    243.86x = 42,402.51
  5. Step 5: Solve for x
    x = 42,402.51/243.86
  6. Step 6: Final answer
    x = 173.88

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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.