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Finding the Third Proportional to 688,440 and 1,491,249

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Solution

The third proportional to 688,440 and 1,491,249 is: 3,230,235.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,440 : 1,491,249 = 1,491,249 : x
  2. Step 2: Convert to fraction form
    688,440/1,491,249 = 1,491,249/x
  3. Step 3: Cross multiply
    688,440x = 1,491,249 × 1,491,249
  4. Step 4: Simplify right side
    688,440x = 2,223,823,580,001
  5. Step 5: Solve for x
    x = 2,223,823,580,001/688,440
  6. Step 6: Final answer
    x = 3,230,235.87

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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.