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Finding the Fourth Proportional to 339.20, 467.94 and 251.72

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Solution

The fourth proportional to 339.20, 467.94 and 251.72 is: 347.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.20 : 467.94 = 251.72 : x
  2. Step 2: Convert to fraction form
    339.20/467.94 = 251.72/x
  3. Step 3: Cross multiply
    339.20x = 467.94 × 251.72
  4. Step 4: Simplify right side
    339.20x = 117,789.86
  5. Step 5: Solve for x
    x = 117,789.86/339.20
  6. Step 6: Final answer
    x = 347.26

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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.