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Finding the Fourth Proportional to 251.57, 376.40 and 226.31

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Solution

The fourth proportional to 251.57, 376.40 and 226.31 is: 338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.57 : 376.40 = 226.31 : x
  2. Step 2: Convert to fraction form
    251.57/376.40 = 226.31/x
  3. Step 3: Cross multiply
    251.57x = 376.40 × 226.31
  4. Step 4: Simplify right side
    251.57x = 85,181.77
  5. Step 5: Solve for x
    x = 85,181.77/251.57
  6. Step 6: Final answer
    x = 338.60

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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.