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Finding the Third Proportional to 381.75 and 823.88

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Solution

The third proportional to 381.75 and 823.88 is: 1,778.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.75 : 823.88 = 823.88 : x
  2. Step 2: Convert to fraction form
    381.75/823.88 = 823.88/x
  3. Step 3: Cross multiply
    381.75x = 823.88 × 823.88
  4. Step 4: Simplify right side
    381.75x = 678,770.02
  5. Step 5: Solve for x
    x = 678,770.02/381.75
  6. Step 6: Final answer
    x = 1,778.05

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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.