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Finding the Third Proportional to 2,912.20 and 4,518.28

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Solution

The third proportional to 2,912.20 and 4,518.28 is: 7,010.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.20 : 4,518.28 = 4,518.28 : x
  2. Step 2: Convert to fraction form
    2,912.20/4,518.28 = 4,518.28/x
  3. Step 3: Cross multiply
    2,912.20x = 4,518.28 × 4,518.28
  4. Step 4: Simplify right side
    2,912.20x = 20,414,865.45
  5. Step 5: Solve for x
    x = 20,414,865.45/2,912.20
  6. Step 6: Final answer
    x = 7,010.11

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.