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Finding the Third Proportional to 4,128.75 and 6,199.88

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Solution

The third proportional to 4,128.75 and 6,199.88 is: 9,309.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,128.75 : 6,199.88 = 6,199.88 : x
  2. Step 2: Convert to fraction form
    4,128.75/6,199.88 = 6,199.88/x
  3. Step 3: Cross multiply
    4,128.75x = 6,199.88 × 6,199.88
  4. Step 4: Simplify right side
    4,128.75x = 38,438,450.02
  5. Step 5: Solve for x
    x = 38,438,450.02/4,128.75
  6. Step 6: Final answer
    x = 9,309.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.