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Finding the Fourth Proportional to 339.12, 467.82 and 256.20

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Solution

The fourth proportional to 339.12, 467.82 and 256.20 is: 353.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.12 : 467.82 = 256.20 : x
  2. Step 2: Convert to fraction form
    339.12/467.82 = 256.20/x
  3. Step 3: Cross multiply
    339.12x = 467.82 × 256.20
  4. Step 4: Simplify right side
    339.12x = 119,855.48
  5. Step 5: Solve for x
    x = 119,855.48/339.12
  6. Step 6: Final answer
    x = 353.43

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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.