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Finding the Fourth Proportional to 306.29, 422.79 and 223.82

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Solution

The fourth proportional to 306.29, 422.79 and 223.82 is: 308.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.29 : 422.79 = 223.82 : x
  2. Step 2: Convert to fraction form
    306.29/422.79 = 223.82/x
  3. Step 3: Cross multiply
    306.29x = 422.79 × 223.82
  4. Step 4: Simplify right side
    306.29x = 94,629.91
  5. Step 5: Solve for x
    x = 94,629.91/306.29
  6. Step 6: Final answer
    x = 308.95

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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.