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Finding the Third Proportional to 311,872 and 683,407

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Solution

The third proportional to 311,872 and 683,407 is: 1,497,553.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,872 : 683,407 = 683,407 : x
  2. Step 2: Convert to fraction form
    311,872/683,407 = 683,407/x
  3. Step 3: Cross multiply
    311,872x = 683,407 × 683,407
  4. Step 4: Simplify right side
    311,872x = 467,045,127,649
  5. Step 5: Solve for x
    x = 467,045,127,649/311,872
  6. Step 6: Final answer
    x = 1,497,553.89

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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.