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Finding the Fourth Proportional to 247.90, 339.88 and 243.52

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Solution

The fourth proportional to 247.90, 339.88 and 243.52 is: 333.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.90 : 339.88 = 243.52 : x
  2. Step 2: Convert to fraction form
    247.90/339.88 = 243.52/x
  3. Step 3: Cross multiply
    247.90x = 339.88 × 243.52
  4. Step 4: Simplify right side
    247.90x = 82,767.58
  5. Step 5: Solve for x
    x = 82,767.58/247.90
  6. Step 6: Final answer
    x = 333.87

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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.