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Finding the Fourth Proportional to 398.96, 550.60 and 233.16

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Solution

The fourth proportional to 398.96, 550.60 and 233.16 is: 321.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.96 : 550.60 = 233.16 : x
  2. Step 2: Convert to fraction form
    398.96/550.60 = 233.16/x
  3. Step 3: Cross multiply
    398.96x = 550.60 × 233.16
  4. Step 4: Simplify right side
    398.96x = 128,377.90
  5. Step 5: Solve for x
    x = 128,377.90/398.96
  6. Step 6: Final answer
    x = 321.78

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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.