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Finding the Fourth Proportional to 281.16, 418.90 and 267.38

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Solution

The fourth proportional to 281.16, 418.90 and 267.38 is: 398.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.16 : 418.90 = 267.38 : x
  2. Step 2: Convert to fraction form
    281.16/418.90 = 267.38/x
  3. Step 3: Cross multiply
    281.16x = 418.90 × 267.38
  4. Step 4: Simplify right side
    281.16x = 112,005.48
  5. Step 5: Solve for x
    x = 112,005.48/281.16
  6. Step 6: Final answer
    x = 398.37

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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.