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Finding the Fourth Proportional to 267.51, 399.39 and 221.97

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Solution

The fourth proportional to 267.51, 399.39 and 221.97 is: 331.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.51 : 399.39 = 221.97 : x
  2. Step 2: Convert to fraction form
    267.51/399.39 = 221.97/x
  3. Step 3: Cross multiply
    267.51x = 399.39 × 221.97
  4. Step 4: Simplify right side
    267.51x = 88,652.60
  5. Step 5: Solve for x
    x = 88,652.60/267.51
  6. Step 6: Final answer
    x = 331.40

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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.