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Finding the Fourth Proportional to 5,728.40, 8,591.40 and 2,808.80

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Solution

The fourth proportional to 5,728.40, 8,591.40 and 2,808.80 is: 4,212.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,728.40 : 8,591.40 = 2,808.80 : x
  2. Step 2: Convert to fraction form
    5,728.40/8,591.40 = 2,808.80/x
  3. Step 3: Cross multiply
    5,728.40x = 8,591.40 × 2,808.80
  4. Step 4: Simplify right side
    5,728.40x = 24,131,524.32
  5. Step 5: Solve for x
    x = 24,131,524.32/5,728.40
  6. Step 6: Final answer
    x = 4,212.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.