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Finding the Third Proportional to 575 and 1,243

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Solution

The third proportional to 575 and 1,243 is: 2,687.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    575 : 1,243 = 1,243 : x
  2. Step 2: Convert to fraction form
    575/1,243 = 1,243/x
  3. Step 3: Cross multiply
    575x = 1,243 × 1,243
  4. Step 4: Simplify right side
    575x = 1,545,049
  5. Step 5: Solve for x
    x = 1,545,049/575
  6. Step 6: Final answer
    x = 2,687.04

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.