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Finding the Third Proportional to 1,018.20 and 2,221.80

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Solution

The third proportional to 1,018.20 and 2,221.80 is: 4,848.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.20 : 2,221.80 = 2,221.80 : x
  2. Step 2: Convert to fraction form
    1,018.20/2,221.80 = 2,221.80/x
  3. Step 3: Cross multiply
    1,018.20x = 2,221.80 × 2,221.80
  4. Step 4: Simplify right side
    1,018.20x = 4,936,416.07
  5. Step 5: Solve for x
    x = 4,936,416.07/1,018.20
  6. Step 6: Final answer
    x = 4,848.20

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.