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Finding the Fourth Proportional to 399.43, 598.28 and 216.44

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Solution

The fourth proportional to 399.43, 598.28 and 216.44 is: 324.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.43 : 598.28 = 216.44 : x
  2. Step 2: Convert to fraction form
    399.43/598.28 = 216.44/x
  3. Step 3: Cross multiply
    399.43x = 598.28 × 216.44
  4. Step 4: Simplify right side
    399.43x = 129,489.15
  5. Step 5: Solve for x
    x = 129,489.15/399.43
  6. Step 6: Final answer
    x = 324.18

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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.