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Finding the Third Proportional to 386.94 and 827.88

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Solution

The third proportional to 386.94 and 827.88 is: 1,771.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.94 : 827.88 = 827.88 : x
  2. Step 2: Convert to fraction form
    386.94/827.88 = 827.88/x
  3. Step 3: Cross multiply
    386.94x = 827.88 × 827.88
  4. Step 4: Simplify right side
    386.94x = 685,377.02
  5. Step 5: Solve for x
    x = 685,377.02/386.94
  6. Step 6: Final answer
    x = 1,771.29

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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.