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Finding the Third Proportional to 2,190.50 and 4,480

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Solution

The third proportional to 2,190.50 and 4,480 is: 9,162.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.50 : 4,480 = 4,480 : x
  2. Step 2: Convert to fraction form
    2,190.50/4,480 = 4,480/x
  3. Step 3: Cross multiply
    2,190.50x = 4,480 × 4,480
  4. Step 4: Simplify right side
    2,190.50x = 20,070,400
  5. Step 5: Solve for x
    x = 20,070,400/2,190.50
  6. Step 6: Final answer
    x = 9,162.47

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.