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Finding the Third Proportional to 311,813 and 682,858

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Solution

The third proportional to 311,813 and 682,858 is: 1,495,431.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,813 : 682,858 = 682,858 : x
  2. Step 2: Convert to fraction form
    311,813/682,858 = 682,858/x
  3. Step 3: Cross multiply
    311,813x = 682,858 × 682,858
  4. Step 4: Simplify right side
    311,813x = 466,295,048,164
  5. Step 5: Solve for x
    x = 466,295,048,164/311,813
  6. Step 6: Final answer
    x = 1,495,431.71

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.