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Finding the Third Proportional to 4,128.75 and 5,019.75

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Solution

The third proportional to 4,128.75 and 5,019.75 is: 6,103.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,128.75 : 5,019.75 = 5,019.75 : x
  2. Step 2: Convert to fraction form
    4,128.75/5,019.75 = 5,019.75/x
  3. Step 3: Cross multiply
    4,128.75x = 5,019.75 × 5,019.75
  4. Step 4: Simplify right side
    4,128.75x = 25,197,890.06
  5. Step 5: Solve for x
    x = 25,197,890.06/4,128.75
  6. Step 6: Final answer
    x = 6,103.03

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.