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Finding the Third Proportional to 315,043 and 691,327

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Solution

The third proportional to 315,043 and 691,327 is: 1,517,040.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,043 : 691,327 = 691,327 : x
  2. Step 2: Convert to fraction form
    315,043/691,327 = 691,327/x
  3. Step 3: Cross multiply
    315,043x = 691,327 × 691,327
  4. Step 4: Simplify right side
    315,043x = 477,933,020,929
  5. Step 5: Solve for x
    x = 477,933,020,929/315,043
  6. Step 6: Final answer
    x = 1,517,040.60

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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.