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Finding the Fourth Proportional to 247.71, 339.62 and 243.32

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Solution

The fourth proportional to 247.71, 339.62 and 243.32 is: 333.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.71 : 339.62 = 243.32 : x
  2. Step 2: Convert to fraction form
    247.71/339.62 = 243.32/x
  3. Step 3: Cross multiply
    247.71x = 339.62 × 243.32
  4. Step 4: Simplify right side
    247.71x = 82,635.12
  5. Step 5: Solve for x
    x = 82,635.12/247.71
  6. Step 6: Final answer
    x = 333.60

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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.