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Finding the Fourth Proportional to 306.49, 422.73 and 213.24

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Solution

The fourth proportional to 306.49, 422.73 and 213.24 is: 294.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.49 : 422.73 = 213.24 : x
  2. Step 2: Convert to fraction form
    306.49/422.73 = 213.24/x
  3. Step 3: Cross multiply
    306.49x = 422.73 × 213.24
  4. Step 4: Simplify right side
    306.49x = 90,142.95
  5. Step 5: Solve for x
    x = 90,142.95/306.49
  6. Step 6: Final answer
    x = 294.11

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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.