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Finding the Fourth Proportional to 3,879.83, 5,354.27 and 2,388.62

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Solution

The fourth proportional to 3,879.83, 5,354.27 and 2,388.62 is: 3,296.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.83 : 5,354.27 = 2,388.62 : x
  2. Step 2: Convert to fraction form
    3,879.83/5,354.27 = 2,388.62/x
  3. Step 3: Cross multiply
    3,879.83x = 5,354.27 × 2,388.62
  4. Step 4: Simplify right side
    3,879.83x = 12,789,316.41
  5. Step 5: Solve for x
    x = 12,789,316.41/3,879.83
  6. Step 6: Final answer
    x = 3,296.36

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1.5x scale

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.