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Finding the Third Proportional to 579 and 1,243

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Solution

The third proportional to 579 and 1,243 is: 2,668.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    579 : 1,243 = 1,243 : x
  2. Step 2: Convert to fraction form
    579/1,243 = 1,243/x
  3. Step 3: Cross multiply
    579x = 1,243 × 1,243
  4. Step 4: Simplify right side
    579x = 1,545,049
  5. Step 5: Solve for x
    x = 1,545,049/579
  6. Step 6: Final answer
    x = 2,668.48

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.