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Finding the Third Proportional to 321,968 and 699,288

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Solution

The third proportional to 321,968 and 699,288 is: 1,518,795.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,968 : 699,288 = 699,288 : x
  2. Step 2: Convert to fraction form
    321,968/699,288 = 699,288/x
  3. Step 3: Cross multiply
    321,968x = 699,288 × 699,288
  4. Step 4: Simplify right side
    321,968x = 489,003,706,944
  5. Step 5: Solve for x
    x = 489,003,706,944/321,968
  6. Step 6: Final answer
    x = 1,518,795.99

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.