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Finding the Fourth Proportional to 3,879.54, 5,354.91 and 2,308.68

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Solution

The fourth proportional to 3,879.54, 5,354.91 and 2,308.68 is: 3,186.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.54 : 5,354.91 = 2,308.68 : x
  2. Step 2: Convert to fraction form
    3,879.54/5,354.91 = 2,308.68/x
  3. Step 3: Cross multiply
    3,879.54x = 5,354.91 × 2,308.68
  4. Step 4: Simplify right side
    3,879.54x = 12,362,773.62
  5. Step 5: Solve for x
    x = 12,362,773.62/3,879.54
  6. Step 6: Final answer
    x = 3,186.66

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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.