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Finding the Fourth Proportional to 243.34, 365.20 and 127.82

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Solution

The fourth proportional to 243.34, 365.20 and 127.82 is: 191.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.34 : 365.20 = 127.82 : x
  2. Step 2: Convert to fraction form
    243.34/365.20 = 127.82/x
  3. Step 3: Cross multiply
    243.34x = 365.20 × 127.82
  4. Step 4: Simplify right side
    243.34x = 46,679.86
  5. Step 5: Solve for x
    x = 46,679.86/243.34
  6. Step 6: Final answer
    x = 191.83

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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.