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Finding the Fourth Proportional to 3,944.64, 5,440.88 and 3,198.64

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Solution

The fourth proportional to 3,944.64, 5,440.88 and 3,198.64 is: 4,411.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,944.64 : 5,440.88 = 3,198.64 : x
  2. Step 2: Convert to fraction form
    3,944.64/5,440.88 = 3,198.64/x
  3. Step 3: Cross multiply
    3,944.64x = 5,440.88 × 3,198.64
  4. Step 4: Simplify right side
    3,944.64x = 17,403,416.40
  5. Step 5: Solve for x
    x = 17,403,416.40/3,944.64
  6. Step 6: Final answer
    x = 4,411.92

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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.