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Finding the Fourth Proportional to 331.42, 457.41 and 191.56

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Solution

The fourth proportional to 331.42, 457.41 and 191.56 is: 264.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.42 : 457.41 = 191.56 : x
  2. Step 2: Convert to fraction form
    331.42/457.41 = 191.56/x
  3. Step 3: Cross multiply
    331.42x = 457.41 × 191.56
  4. Step 4: Simplify right side
    331.42x = 87,621.46
  5. Step 5: Solve for x
    x = 87,621.46/331.42
  6. Step 6: Final answer
    x = 264.38

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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.