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Finding the Third Proportional to 655,589 and 989,378

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Solution

The third proportional to 655,589 and 989,378 is: 1,493,113.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,589 : 989,378 = 989,378 : x
  2. Step 2: Convert to fraction form
    655,589/989,378 = 989,378/x
  3. Step 3: Cross multiply
    655,589x = 989,378 × 989,378
  4. Step 4: Simplify right side
    655,589x = 978,868,826,884
  5. Step 5: Solve for x
    x = 978,868,826,884/655,589
  6. Step 6: Final answer
    x = 1,493,113.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.