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Finding the Third Proportional to 201.66 and 411.19

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Solution

The third proportional to 201.66 and 411.19 is: 838.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.66 : 411.19 = 411.19 : x
  2. Step 2: Convert to fraction form
    201.66/411.19 = 411.19/x
  3. Step 3: Cross multiply
    201.66x = 411.19 × 411.19
  4. Step 4: Simplify right side
    201.66x = 169,075.16
  5. Step 5: Solve for x
    x = 169,075.16/201.66
  6. Step 6: Final answer
    x = 838.43

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.