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Finding the Third Proportional to 199,136 and 315,474

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Solution

The third proportional to 199,136 and 315,474 is: 499,778.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,136 : 315,474 = 315,474 : x
  2. Step 2: Convert to fraction form
    199,136/315,474 = 315,474/x
  3. Step 3: Cross multiply
    199,136x = 315,474 × 315,474
  4. Step 4: Simplify right side
    199,136x = 99,523,844,676
  5. Step 5: Solve for x
    x = 99,523,844,676/199,136
  6. Step 6: Final answer
    x = 499,778.27

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.