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Finding the Fourth Proportional to 331.12, 494.90 and 267.04

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Solution

The fourth proportional to 331.12, 494.90 and 267.04 is: 399.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.12 : 494.90 = 267.04 : x
  2. Step 2: Convert to fraction form
    331.12/494.90 = 267.04/x
  3. Step 3: Cross multiply
    331.12x = 494.90 × 267.04
  4. Step 4: Simplify right side
    331.12x = 132,158.10
  5. Step 5: Solve for x
    x = 132,158.10/331.12
  6. Step 6: Final answer
    x = 399.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.