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Finding the Fourth Proportional to 247.78, 344.32 and 245.29

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Solution

The fourth proportional to 247.78, 344.32 and 245.29 is: 340.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.78 : 344.32 = 245.29 : x
  2. Step 2: Convert to fraction form
    247.78/344.32 = 245.29/x
  3. Step 3: Cross multiply
    247.78x = 344.32 × 245.29
  4. Step 4: Simplify right side
    247.78x = 84,458.25
  5. Step 5: Solve for x
    x = 84,458.25/247.78
  6. Step 6: Final answer
    x = 340.86

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.