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Finding the Fourth Proportional to 306.33, 422.60 and 213.27

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Solution

The fourth proportional to 306.33, 422.60 and 213.27 is: 294.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.33 : 422.60 = 213.27 : x
  2. Step 2: Convert to fraction form
    306.33/422.60 = 213.27/x
  3. Step 3: Cross multiply
    306.33x = 422.60 × 213.27
  4. Step 4: Simplify right side
    306.33x = 90,126.84
  5. Step 5: Solve for x
    x = 90,126.84/306.33
  6. Step 6: Final answer
    x = 294.21

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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.