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Finding the Fourth Proportional to 338.88, 508.31 and 82.38

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Solution

The fourth proportional to 338.88, 508.31 and 82.38 is: 123.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.88 : 508.31 = 82.38 : x
  2. Step 2: Convert to fraction form
    338.88/508.31 = 82.38/x
  3. Step 3: Cross multiply
    338.88x = 508.31 × 82.38
  4. Step 4: Simplify right side
    338.88x = 41,874.58
  5. Step 5: Solve for x
    x = 41,874.58/338.88
  6. Step 6: Final answer
    x = 123.57

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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.