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Finding the Fourth Proportional to 306.24, 422.31 and 201.39

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Solution

The fourth proportional to 306.24, 422.31 and 201.39 is: 277.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.24 : 422.31 = 201.39 : x
  2. Step 2: Convert to fraction form
    306.24/422.31 = 201.39/x
  3. Step 3: Cross multiply
    306.24x = 422.31 × 201.39
  4. Step 4: Simplify right side
    306.24x = 85,049.01
  5. Step 5: Solve for x
    x = 85,049.01/306.24
  6. Step 6: Final answer
    x = 277.72

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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.