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Finding the Fourth Proportional to 1,998.60, 3,003.30 and 1,979.16

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Solution

The fourth proportional to 1,998.60, 3,003.30 and 1,979.16 is: 2,974.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.60 : 3,003.30 = 1,979.16 : x
  2. Step 2: Convert to fraction form
    1,998.60/3,003.30 = 1,979.16/x
  3. Step 3: Cross multiply
    1,998.60x = 3,003.30 × 1,979.16
  4. Step 4: Simplify right side
    1,998.60x = 5,944,011.23
  5. Step 5: Solve for x
    x = 5,944,011.23/1,998.60
  6. Step 6: Final answer
    x = 2,974.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.