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Finding the Third Proportional to 318,900 and 676,672

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Solution

The third proportional to 318,900 and 676,672 is: 1,435,826.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,900 : 676,672 = 676,672 : x
  2. Step 2: Convert to fraction form
    318,900/676,672 = 676,672/x
  3. Step 3: Cross multiply
    318,900x = 676,672 × 676,672
  4. Step 4: Simplify right side
    318,900x = 457,884,995,584
  5. Step 5: Solve for x
    x = 457,884,995,584/318,900
  6. Step 6: Final answer
    x = 1,435,826.26

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.