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Finding the Third Proportional to 811 and 1,936

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Solution

The third proportional to 811 and 1,936 is: 4,621.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    811 : 1,936 = 1,936 : x
  2. Step 2: Convert to fraction form
    811/1,936 = 1,936/x
  3. Step 3: Cross multiply
    811x = 1,936 × 1,936
  4. Step 4: Simplify right side
    811x = 3,748,096
  5. Step 5: Solve for x
    x = 3,748,096/811
  6. Step 6: Final answer
    x = 4,621.57

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.