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Finding the Third Proportional to 138,653 and 283,878

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Solution

The third proportional to 138,653 and 283,878 is: 581,211.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,653 : 283,878 = 283,878 : x
  2. Step 2: Convert to fraction form
    138,653/283,878 = 283,878/x
  3. Step 3: Cross multiply
    138,653x = 283,878 × 283,878
  4. Step 4: Simplify right side
    138,653x = 80,586,718,884
  5. Step 5: Solve for x
    x = 80,586,718,884/138,653
  6. Step 6: Final answer
    x = 581,211.51

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.