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Finding the Third Proportional to 311,520 and 682,008

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Solution

The third proportional to 311,520 and 682,008 is: 1,493,114.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,520 : 682,008 = 682,008 : x
  2. Step 2: Convert to fraction form
    311,520/682,008 = 682,008/x
  3. Step 3: Cross multiply
    311,520x = 682,008 × 682,008
  4. Step 4: Simplify right side
    311,520x = 465,134,912,064
  5. Step 5: Solve for x
    x = 465,134,912,064/311,520
  6. Step 6: Final answer
    x = 1,493,114.12

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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.