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Finding the Fourth Proportional to 422.05, 632.70 and 227.15

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Solution

The fourth proportional to 422.05, 632.70 and 227.15 is: 340.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.05 : 632.70 = 227.15 : x
  2. Step 2: Convert to fraction form
    422.05/632.70 = 227.15/x
  3. Step 3: Cross multiply
    422.05x = 632.70 × 227.15
  4. Step 4: Simplify right side
    422.05x = 143,717.81
  5. Step 5: Solve for x
    x = 143,717.81/422.05
  6. Step 6: Final answer
    x = 340.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.