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Finding the Fourth Proportional to 5,390.41, 8,085.14 and 1,879.82

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Solution

The fourth proportional to 5,390.41, 8,085.14 and 1,879.82 is: 2,819.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.41 : 8,085.14 = 1,879.82 : x
  2. Step 2: Convert to fraction form
    5,390.41/8,085.14 = 1,879.82/x
  3. Step 3: Cross multiply
    5,390.41x = 8,085.14 × 1,879.82
  4. Step 4: Simplify right side
    5,390.41x = 15,198,607.87
  5. Step 5: Solve for x
    x = 15,198,607.87/5,390.41
  6. Step 6: Final answer
    x = 2,819.56

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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.