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Finding the Third Proportional to 1,815.75 and 3,186

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Solution

The third proportional to 1,815.75 and 3,186 is: 5,590.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.75 : 3,186 = 3,186 : x
  2. Step 2: Convert to fraction form
    1,815.75/3,186 = 3,186/x
  3. Step 3: Cross multiply
    1,815.75x = 3,186 × 3,186
  4. Step 4: Simplify right side
    1,815.75x = 10,150,596
  5. Step 5: Solve for x
    x = 10,150,596/1,815.75
  6. Step 6: Final answer
    x = 5,590.30

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.