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Finding the Third Proportional to 423.56 and 825.75

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Solution

The third proportional to 423.56 and 825.75 is: 1,609.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.56 : 825.75 = 825.75 : x
  2. Step 2: Convert to fraction form
    423.56/825.75 = 825.75/x
  3. Step 3: Cross multiply
    423.56x = 825.75 × 825.75
  4. Step 4: Simplify right side
    423.56x = 681,863.06
  5. Step 5: Solve for x
    x = 681,863.06/423.56
  6. Step 6: Final answer
    x = 1,609.83

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.