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Finding the Third Proportional to 4,120.50 and 5,517

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Solution

The third proportional to 4,120.50 and 5,517 is: 7,386.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,120.50 : 5,517 = 5,517 : x
  2. Step 2: Convert to fraction form
    4,120.50/5,517 = 5,517/x
  3. Step 3: Cross multiply
    4,120.50x = 5,517 × 5,517
  4. Step 4: Simplify right side
    4,120.50x = 30,437,289
  5. Step 5: Solve for x
    x = 30,437,289/4,120.50
  6. Step 6: Final answer
    x = 7,386.80

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.