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Finding the Third Proportional to 885 and 2,143.50

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Solution

The third proportional to 885 and 2,143.50 is: 5,191.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    885 : 2,143.50 = 2,143.50 : x
  2. Step 2: Convert to fraction form
    885/2,143.50 = 2,143.50/x
  3. Step 3: Cross multiply
    885x = 2,143.50 × 2,143.50
  4. Step 4: Simplify right side
    885x = 4,594,592.25
  5. Step 5: Solve for x
    x = 4,594,592.25/885
  6. Step 6: Final answer
    x = 5,191.63

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.