Home / 3,161.20-4,741.62-1,311.88

Finding the Fourth Proportional to 3,161.20, 4,741.62 and 1,311.88

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Solution

The fourth proportional to 3,161.20, 4,741.62 and 1,311.88 is: 1,967.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.20 : 4,741.62 = 1,311.88 : x
  2. Step 2: Convert to fraction form
    3,161.20/4,741.62 = 1,311.88/x
  3. Step 3: Cross multiply
    3,161.20x = 4,741.62 × 1,311.88
  4. Step 4: Simplify right side
    3,161.20x = 6,220,436.45
  5. Step 5: Solve for x
    x = 6,220,436.45/3,161.20
  6. Step 6: Final answer
    x = 1,967.75

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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.