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Finding the Fourth Proportional to 339.30, 508.46 and 133.74

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Solution

The fourth proportional to 339.30, 508.46 and 133.74 is: 200.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.30 : 508.46 = 133.74 : x
  2. Step 2: Convert to fraction form
    339.30/508.46 = 133.74/x
  3. Step 3: Cross multiply
    339.30x = 508.46 × 133.74
  4. Step 4: Simplify right side
    339.30x = 68,000.77
  5. Step 5: Solve for x
    x = 68,000.77/339.30
  6. Step 6: Final answer
    x = 200.41

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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.