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Finding the Third Proportional to 1,990.83 and 4,377.80

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Solution

The third proportional to 1,990.83 and 4,377.80 is: 9,626.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.83 : 4,377.80 = 4,377.80 : x
  2. Step 2: Convert to fraction form
    1,990.83/4,377.80 = 4,377.80/x
  3. Step 3: Cross multiply
    1,990.83x = 4,377.80 × 4,377.80
  4. Step 4: Simplify right side
    1,990.83x = 19,165,105.48
  5. Step 5: Solve for x
    x = 19,165,105.48/1,990.83
  6. Step 6: Final answer
    x = 9,626.70

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.