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Finding the Fourth Proportional to 3,879.68, 5,818.96 and 1,659.40

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Solution

The fourth proportional to 3,879.68, 5,818.96 and 1,659.40 is: 2,488.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.68 : 5,818.96 = 1,659.40 : x
  2. Step 2: Convert to fraction form
    3,879.68/5,818.96 = 1,659.40/x
  3. Step 3: Cross multiply
    3,879.68x = 5,818.96 × 1,659.40
  4. Step 4: Simplify right side
    3,879.68x = 9,655,982.22
  5. Step 5: Solve for x
    x = 9,655,982.22/3,879.68
  6. Step 6: Final answer
    x = 2,488.86

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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.