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Finding the Fourth Proportional to 247.63, 339.25 and 238.40

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Solution

The fourth proportional to 247.63, 339.25 and 238.40 is: 326.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.63 : 339.25 = 238.40 : x
  2. Step 2: Convert to fraction form
    247.63/339.25 = 238.40/x
  3. Step 3: Cross multiply
    247.63x = 339.25 × 238.40
  4. Step 4: Simplify right side
    247.63x = 80,877.20
  5. Step 5: Solve for x
    x = 80,877.20/247.63
  6. Step 6: Final answer
    x = 326.61

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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.