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Finding the Third Proportional to 1,915.50 and 4,005

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Solution

The third proportional to 1,915.50 and 4,005 is: 8,373.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.50 : 4,005 = 4,005 : x
  2. Step 2: Convert to fraction form
    1,915.50/4,005 = 4,005/x
  3. Step 3: Cross multiply
    1,915.50x = 4,005 × 4,005
  4. Step 4: Simplify right side
    1,915.50x = 16,040,025
  5. Step 5: Solve for x
    x = 16,040,025/1,915.50
  6. Step 6: Final answer
    x = 8,373.81

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.