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Finding the Third Proportional to 422.79 and 922.43

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Solution

The third proportional to 422.79 and 922.43 is: 2,012.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.79 : 922.43 = 922.43 : x
  2. Step 2: Convert to fraction form
    422.79/922.43 = 922.43/x
  3. Step 3: Cross multiply
    422.79x = 922.43 × 922.43
  4. Step 4: Simplify right side
    422.79x = 850,876.53
  5. Step 5: Solve for x
    x = 850,876.53/422.79
  6. Step 6: Final answer
    x = 2,012.53

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.