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Finding the Fourth Proportional to 2,939.82, 4,410.33 and 991.97

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Solution

The fourth proportional to 2,939.82, 4,410.33 and 991.97 is: 1,488.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.82 : 4,410.33 = 991.97 : x
  2. Step 2: Convert to fraction form
    2,939.82/4,410.33 = 991.97/x
  3. Step 3: Cross multiply
    2,939.82x = 4,410.33 × 991.97
  4. Step 4: Simplify right side
    2,939.82x = 4,374,911.40
  5. Step 5: Solve for x
    x = 4,374,911.40/2,939.82
  6. Step 6: Final answer
    x = 1,488.16

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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.