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Finding the Third Proportional to 312,212 and 671,818

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Solution

The third proportional to 312,212 and 671,818 is: 1,445,618.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,212 : 671,818 = 671,818 : x
  2. Step 2: Convert to fraction form
    312,212/671,818 = 671,818/x
  3. Step 3: Cross multiply
    312,212x = 671,818 × 671,818
  4. Step 4: Simplify right side
    312,212x = 451,339,425,124
  5. Step 5: Solve for x
    x = 451,339,425,124/312,212
  6. Step 6: Final answer
    x = 1,445,618.44

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.