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Finding the Third Proportional to 837.21 and 1,821.55

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Solution

The third proportional to 837.21 and 1,821.55 is: 3,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.21 : 1,821.55 = 1,821.55 : x
  2. Step 2: Convert to fraction form
    837.21/1,821.55 = 1,821.55/x
  3. Step 3: Cross multiply
    837.21x = 1,821.55 × 1,821.55
  4. Step 4: Simplify right side
    837.21x = 3,318,047.25
  5. Step 5: Solve for x
    x = 3,318,047.25/837.21
  6. Step 6: Final answer
    x = 3,963.22

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.