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Finding the Fourth Proportional to 3,797.20, 5,687.70 and 3,311.20

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Solution

The fourth proportional to 3,797.20, 5,687.70 and 3,311.20 is: 4,959.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,797.20 : 5,687.70 = 3,311.20 : x
  2. Step 2: Convert to fraction form
    3,797.20/5,687.70 = 3,311.20/x
  3. Step 3: Cross multiply
    3,797.20x = 5,687.70 × 3,311.20
  4. Step 4: Simplify right side
    3,797.20x = 18,833,112.24
  5. Step 5: Solve for x
    x = 18,833,112.24/3,797.20
  6. Step 6: Final answer
    x = 4,959.74

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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.