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Finding the Fourth Proportional to 2,379.81, 3,284.11 and 1,331.88

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Solution

The fourth proportional to 2,379.81, 3,284.11 and 1,331.88 is: 1,837.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.81 : 3,284.11 = 1,331.88 : x
  2. Step 2: Convert to fraction form
    2,379.81/3,284.11 = 1,331.88/x
  3. Step 3: Cross multiply
    2,379.81x = 3,284.11 × 1,331.88
  4. Step 4: Simplify right side
    2,379.81x = 4,374,029.78
  5. Step 5: Solve for x
    x = 4,374,029.78/2,379.81
  6. Step 6: Final answer
    x = 1,837.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.