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Finding the Fourth Proportional to 382.91, 572.99 and 331.72

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Solution

The fourth proportional to 382.91, 572.99 and 331.72 is: 496.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.91 : 572.99 = 331.72 : x
  2. Step 2: Convert to fraction form
    382.91/572.99 = 331.72/x
  3. Step 3: Cross multiply
    382.91x = 572.99 × 331.72
  4. Step 4: Simplify right side
    382.91x = 190,070.58
  5. Step 5: Solve for x
    x = 190,070.58/382.91
  6. Step 6: Final answer
    x = 496.39

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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.