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Finding the Third Proportional to 319,769 and 687,925

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Solution

The third proportional to 319,769 and 687,925 is: 1,479,945.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,769 : 687,925 = 687,925 : x
  2. Step 2: Convert to fraction form
    319,769/687,925 = 687,925/x
  3. Step 3: Cross multiply
    319,769x = 687,925 × 687,925
  4. Step 4: Simplify right side
    319,769x = 473,240,805,625
  5. Step 5: Solve for x
    x = 473,240,805,625/319,769
  6. Step 6: Final answer
    x = 1,479,945.85

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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.