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Finding the Fourth Proportional to 306.06, 422.20 and 201.12

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Solution

The fourth proportional to 306.06, 422.20 and 201.12 is: 277.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.06 : 422.20 = 201.12 : x
  2. Step 2: Convert to fraction form
    306.06/422.20 = 201.12/x
  3. Step 3: Cross multiply
    306.06x = 422.20 × 201.12
  4. Step 4: Simplify right side
    306.06x = 84,912.86
  5. Step 5: Solve for x
    x = 84,912.86/306.06
  6. Step 6: Final answer
    x = 277.44

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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.