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Finding the Third Proportional to 311,874 and 683,411

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Solution

The third proportional to 311,874 and 683,411 is: 1,497,561.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,874 : 683,411 = 683,411 : x
  2. Step 2: Convert to fraction form
    311,874/683,411 = 683,411/x
  3. Step 3: Cross multiply
    311,874x = 683,411 × 683,411
  4. Step 4: Simplify right side
    311,874x = 467,050,594,921
  5. Step 5: Solve for x
    x = 467,050,594,921/311,874
  6. Step 6: Final answer
    x = 1,497,561.82

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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.