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Finding the Fourth Proportional to 331.26, 457.22 and 191.43

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Solution

The fourth proportional to 331.26, 457.22 and 191.43 is: 264.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.26 : 457.22 = 191.43 : x
  2. Step 2: Convert to fraction form
    331.26/457.22 = 191.43/x
  3. Step 3: Cross multiply
    331.26x = 457.22 × 191.43
  4. Step 4: Simplify right side
    331.26x = 87,523.64
  5. Step 5: Solve for x
    x = 87,523.64/331.26
  6. Step 6: Final answer
    x = 264.21

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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.