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Finding the Fourth Proportional to 331.79, 458.01 and 243.27

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Solution

The fourth proportional to 331.79, 458.01 and 243.27 is: 335.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.79 : 458.01 = 243.27 : x
  2. Step 2: Convert to fraction form
    331.79/458.01 = 243.27/x
  3. Step 3: Cross multiply
    331.79x = 458.01 × 243.27
  4. Step 4: Simplify right side
    331.79x = 111,419.86
  5. Step 5: Solve for x
    x = 111,419.86/331.79
  6. Step 6: Final answer
    x = 335.82

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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.