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Finding the Fourth Proportional to 331.73, 457.72 and 191.79

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Solution

The fourth proportional to 331.73, 457.72 and 191.79 is: 264.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.73 : 457.72 = 191.79 : x
  2. Step 2: Convert to fraction form
    331.73/457.72 = 191.79/x
  3. Step 3: Cross multiply
    331.73x = 457.72 × 191.79
  4. Step 4: Simplify right side
    331.73x = 87,787.75
  5. Step 5: Solve for x
    x = 87,787.75/331.73
  6. Step 6: Final answer
    x = 264.64

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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.