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Finding the Third Proportional to 638.25 and 898.75

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Solution

The third proportional to 638.25 and 898.75 is: 1,265.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.25 : 898.75 = 898.75 : x
  2. Step 2: Convert to fraction form
    638.25/898.75 = 898.75/x
  3. Step 3: Cross multiply
    638.25x = 898.75 × 898.75
  4. Step 4: Simplify right side
    638.25x = 807,751.56
  5. Step 5: Solve for x
    x = 807,751.56/638.25
  6. Step 6: Final answer
    x = 1,265.57

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These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.