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Finding the Third Proportional to 1,815.25 and 3,900.25

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Solution

The third proportional to 1,815.25 and 3,900.25 is: 8,380.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.25 : 3,900.25 = 3,900.25 : x
  2. Step 2: Convert to fraction form
    1,815.25/3,900.25 = 3,900.25/x
  3. Step 3: Cross multiply
    1,815.25x = 3,900.25 × 3,900.25
  4. Step 4: Simplify right side
    1,815.25x = 15,211,950.06
  5. Step 5: Solve for x
    x = 15,211,950.06/1,815.25
  6. Step 6: Final answer
    x = 8,380.09

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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.