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Finding the Fourth Proportional to 3,928.64, 5,919.56 and 3,250.56

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Solution

The fourth proportional to 3,928.64, 5,919.56 and 3,250.56 is: 4,897.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.64 : 5,919.56 = 3,250.56 : x
  2. Step 2: Convert to fraction form
    3,928.64/5,919.56 = 3,250.56/x
  3. Step 3: Cross multiply
    3,928.64x = 5,919.56 × 3,250.56
  4. Step 4: Simplify right side
    3,928.64x = 19,241,884.95
  5. Step 5: Solve for x
    x = 19,241,884.95/3,928.64
  6. Step 6: Final answer
    x = 4,897.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.