Home / 3,879.44-5,354.88-2,884.40

Finding the Fourth Proportional to 3,879.44, 5,354.88 and 2,884.40

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Solution

The fourth proportional to 3,879.44, 5,354.88 and 2,884.40 is: 3,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.44 : 5,354.88 = 2,884.40 : x
  2. Step 2: Convert to fraction form
    3,879.44/5,354.88 = 2,884.40/x
  3. Step 3: Cross multiply
    3,879.44x = 5,354.88 × 2,884.40
  4. Step 4: Simplify right side
    3,879.44x = 15,445,615.87
  5. Step 5: Solve for x
    x = 15,445,615.87/3,879.44
  6. Step 6: Final answer
    x = 3,981.40

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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.