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Finding the Fourth Proportional to 331.89, 458 and 191.98

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Solution

The fourth proportional to 331.89, 458 and 191.98 is: 264.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.89 : 458 = 191.98 : x
  2. Step 2: Convert to fraction form
    331.89/458 = 191.98/x
  3. Step 3: Cross multiply
    331.89x = 458 × 191.98
  4. Step 4: Simplify right side
    331.89x = 87,926.84
  5. Step 5: Solve for x
    x = 87,926.84/331.89
  6. Step 6: Final answer
    x = 264.93

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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.