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Finding the Fourth Proportional to 426.20, 587.92 and 251.48

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Solution

The fourth proportional to 426.20, 587.92 and 251.48 is: 346.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.20 : 587.92 = 251.48 : x
  2. Step 2: Convert to fraction form
    426.20/587.92 = 251.48/x
  3. Step 3: Cross multiply
    426.20x = 587.92 × 251.48
  4. Step 4: Simplify right side
    426.20x = 147,850.12
  5. Step 5: Solve for x
    x = 147,850.12/426.20
  6. Step 6: Final answer
    x = 346.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.