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Finding the Fourth Proportional to 253.54, 351.28 and 249.60

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Solution

The fourth proportional to 253.54, 351.28 and 249.60 is: 345.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.54 : 351.28 = 249.60 : x
  2. Step 2: Convert to fraction form
    253.54/351.28 = 249.60/x
  3. Step 3: Cross multiply
    253.54x = 351.28 × 249.60
  4. Step 4: Simplify right side
    253.54x = 87,679.49
  5. Step 5: Solve for x
    x = 87,679.49/253.54
  6. Step 6: Final answer
    x = 345.82

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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.