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Finding the Fourth Proportional to 3,879.54, 5,821.47 and 1,572.66

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Solution

The fourth proportional to 3,879.54, 5,821.47 and 1,572.66 is: 2,359.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.54 : 5,821.47 = 1,572.66 : x
  2. Step 2: Convert to fraction form
    3,879.54/5,821.47 = 1,572.66/x
  3. Step 3: Cross multiply
    3,879.54x = 5,821.47 × 1,572.66
  4. Step 4: Simplify right side
    3,879.54x = 9,155,193.01
  5. Step 5: Solve for x
    x = 9,155,193.01/3,879.54
  6. Step 6: Final answer
    x = 2,359.87

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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.