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Finding the Third Proportional to 285,111 and 398,601

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Solution

The third proportional to 285,111 and 398,601 is: 557,266.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,111 : 398,601 = 398,601 : x
  2. Step 2: Convert to fraction form
    285,111/398,601 = 398,601/x
  3. Step 3: Cross multiply
    285,111x = 398,601 × 398,601
  4. Step 4: Simplify right side
    285,111x = 158,882,757,201
  5. Step 5: Solve for x
    x = 158,882,757,201/285,111
  6. Step 6: Final answer
    x = 557,266.32

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.