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Finding the Fourth Proportional to 339.53, 467.17 and 321.71

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Solution

The fourth proportional to 339.53, 467.17 and 321.71 is: 442.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.53 : 467.17 = 321.71 : x
  2. Step 2: Convert to fraction form
    339.53/467.17 = 321.71/x
  3. Step 3: Cross multiply
    339.53x = 467.17 × 321.71
  4. Step 4: Simplify right side
    339.53x = 150,290.12
  5. Step 5: Solve for x
    x = 150,290.12/339.53
  6. Step 6: Final answer
    x = 442.65

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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.