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Finding the Fourth Proportional to 5,221.28, 7,205.28 and 2,863.64

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Solution

The fourth proportional to 5,221.28, 7,205.28 and 2,863.64 is: 3,951.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.28 : 7,205.28 = 2,863.64 : x
  2. Step 2: Convert to fraction form
    5,221.28/7,205.28 = 2,863.64/x
  3. Step 3: Cross multiply
    5,221.28x = 7,205.28 × 2,863.64
  4. Step 4: Simplify right side
    5,221.28x = 20,633,328.02
  5. Step 5: Solve for x
    x = 20,633,328.02/5,221.28
  6. Step 6: Final answer
    x = 3,951.78

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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.