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Finding the Third Proportional to 4,648.50 and 7,121.25

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Solution

The third proportional to 4,648.50 and 7,121.25 is: 10,909.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,648.50 : 7,121.25 = 7,121.25 : x
  2. Step 2: Convert to fraction form
    4,648.50/7,121.25 = 7,121.25/x
  3. Step 3: Cross multiply
    4,648.50x = 7,121.25 × 7,121.25
  4. Step 4: Simplify right side
    4,648.50x = 50,712,201.56
  5. Step 5: Solve for x
    x = 50,712,201.56/4,648.50
  6. Step 6: Final answer
    x = 10,909.37

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.