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Finding the Fourth Proportional to 331.90, 458.02 and 200.81

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Solution

The fourth proportional to 331.90, 458.02 and 200.81 is: 277.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.90 : 458.02 = 200.81 : x
  2. Step 2: Convert to fraction form
    331.90/458.02 = 200.81/x
  3. Step 3: Cross multiply
    331.90x = 458.02 × 200.81
  4. Step 4: Simplify right side
    331.90x = 91,976.39
  5. Step 5: Solve for x
    x = 91,976.39/331.90
  6. Step 6: Final answer
    x = 277.12

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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.