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Finding the Fourth Proportional to 305.97, 422.21 and 227.33

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Solution

The fourth proportional to 305.97, 422.21 and 227.33 is: 313.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.97 : 422.21 = 227.33 : x
  2. Step 2: Convert to fraction form
    305.97/422.21 = 227.33/x
  3. Step 3: Cross multiply
    305.97x = 422.21 × 227.33
  4. Step 4: Simplify right side
    305.97x = 95,977.75
  5. Step 5: Solve for x
    x = 95,977.75/305.97
  6. Step 6: Final answer
    x = 313.68

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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.