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Finding the Fourth Proportional to 339.22, 508.22 and 252.55

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Solution

The fourth proportional to 339.22, 508.22 and 252.55 is: 378.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.22 : 508.22 = 252.55 : x
  2. Step 2: Convert to fraction form
    339.22/508.22 = 252.55/x
  3. Step 3: Cross multiply
    339.22x = 508.22 × 252.55
  4. Step 4: Simplify right side
    339.22x = 128,350.96
  5. Step 5: Solve for x
    x = 128,350.96/339.22
  6. Step 6: Final answer
    x = 378.37

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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.