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Finding the Third Proportional to 815.75 and 1,591.75

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Solution

The third proportional to 815.75 and 1,591.75 is: 3,105.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.75 : 1,591.75 = 1,591.75 : x
  2. Step 2: Convert to fraction form
    815.75/1,591.75 = 1,591.75/x
  3. Step 3: Cross multiply
    815.75x = 1,591.75 × 1,591.75
  4. Step 4: Simplify right side
    815.75x = 2,533,668.06
  5. Step 5: Solve for x
    x = 2,533,668.06/815.75
  6. Step 6: Final answer
    x = 3,105.94

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.