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Finding the Third Proportional to 3,828.94 and 5,420.25

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Solution

The third proportional to 3,828.94 and 5,420.25 is: 7,672.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,828.94 : 5,420.25 = 5,420.25 : x
  2. Step 2: Convert to fraction form
    3,828.94/5,420.25 = 5,420.25/x
  3. Step 3: Cross multiply
    3,828.94x = 5,420.25 × 5,420.25
  4. Step 4: Simplify right side
    3,828.94x = 29,379,110.06
  5. Step 5: Solve for x
    x = 29,379,110.06/3,828.94
  6. Step 6: Final answer
    x = 7,672.91

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.