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Finding the Fourth Proportional to 3,879.97, 5,354.88 and 3,774.43

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Solution

The fourth proportional to 3,879.97, 5,354.88 and 3,774.43 is: 5,209.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.97 : 5,354.88 = 3,774.43 : x
  2. Step 2: Convert to fraction form
    3,879.97/5,354.88 = 3,774.43/x
  3. Step 3: Cross multiply
    3,879.97x = 5,354.88 × 3,774.43
  4. Step 4: Simplify right side
    3,879.97x = 20,211,612.26
  5. Step 5: Solve for x
    x = 20,211,612.26/3,879.97
  6. Step 6: Final answer
    x = 5,209.22

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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.