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Finding the Fourth Proportional to 251.05, 376.52 and 68.42

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Solution

The fourth proportional to 251.05, 376.52 and 68.42 is: 102.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.05 : 376.52 = 68.42 : x
  2. Step 2: Convert to fraction form
    251.05/376.52 = 68.42/x
  3. Step 3: Cross multiply
    251.05x = 376.52 × 68.42
  4. Step 4: Simplify right side
    251.05x = 25,761.62
  5. Step 5: Solve for x
    x = 25,761.62/251.05
  6. Step 6: Final answer
    x = 102.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.