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Finding the Fourth Proportional to 5,390.62, 8,083.91 and 1,879.72

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Solution

The fourth proportional to 5,390.62, 8,083.91 and 1,879.72 is: 2,818.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.62 : 8,083.91 = 1,879.72 : x
  2. Step 2: Convert to fraction form
    5,390.62/8,083.91 = 1,879.72/x
  3. Step 3: Cross multiply
    5,390.62x = 8,083.91 × 1,879.72
  4. Step 4: Simplify right side
    5,390.62x = 15,195,488.01
  5. Step 5: Solve for x
    x = 15,195,488.01/5,390.62
  6. Step 6: Final answer
    x = 2,818.88

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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.