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Finding the Third Proportional to 687.87 and 1,475.09

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Solution

The third proportional to 687.87 and 1,475.09 is: 3,163.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.87 : 1,475.09 = 1,475.09 : x
  2. Step 2: Convert to fraction form
    687.87/1,475.09 = 1,475.09/x
  3. Step 3: Cross multiply
    687.87x = 1,475.09 × 1,475.09
  4. Step 4: Simplify right side
    687.87x = 2,175,878.52
  5. Step 5: Solve for x
    x = 2,175,878.52/687.87
  6. Step 6: Final answer
    x = 3,163.22

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.