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Finding the Fourth Proportional to 398.80, 596.92 and 322

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Solution

The fourth proportional to 398.80, 596.92 and 322 is: 481.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.80 : 596.92 = 322 : x
  2. Step 2: Convert to fraction form
    398.80/596.92 = 322/x
  3. Step 3: Cross multiply
    398.80x = 596.92 × 322
  4. Step 4: Simplify right side
    398.80x = 192,208.24
  5. Step 5: Solve for x
    x = 192,208.24/398.80
  6. Step 6: Final answer
    x = 481.97

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.