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Finding the Third Proportional to 285,266 and 398,799

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Solution

The third proportional to 285,266 and 398,799 is: 557,516.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,266 : 398,799 = 398,799 : x
  2. Step 2: Convert to fraction form
    285,266/398,799 = 398,799/x
  3. Step 3: Cross multiply
    285,266x = 398,799 × 398,799
  4. Step 4: Simplify right side
    285,266x = 159,040,642,401
  5. Step 5: Solve for x
    x = 159,040,642,401/285,266
  6. Step 6: Final answer
    x = 557,516.99

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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.