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Finding the Third Proportional to 3,915 and 5,217.75

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Solution

The third proportional to 3,915 and 5,217.75 is: 6,954.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915 : 5,217.75 = 5,217.75 : x
  2. Step 2: Convert to fraction form
    3,915/5,217.75 = 5,217.75/x
  3. Step 3: Cross multiply
    3,915x = 5,217.75 × 5,217.75
  4. Step 4: Simplify right side
    3,915x = 27,224,915.06
  5. Step 5: Solve for x
    x = 27,224,915.06/3,915
  6. Step 6: Final answer
    x = 6,954.00

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.