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Finding the Fourth Proportional to 247.86, 339.59 and 238.65

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Solution

The fourth proportional to 247.86, 339.59 and 238.65 is: 326.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.86 : 339.59 = 238.65 : x
  2. Step 2: Convert to fraction form
    247.86/339.59 = 238.65/x
  3. Step 3: Cross multiply
    247.86x = 339.59 × 238.65
  4. Step 4: Simplify right side
    247.86x = 81,042.48
  5. Step 5: Solve for x
    x = 81,042.48/247.86
  6. Step 6: Final answer
    x = 326.97

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.