Home / 3,311.20-4,967.16-1,121.50

Finding the Fourth Proportional to 3,311.20, 4,967.16 and 1,121.50

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Solution

The fourth proportional to 3,311.20, 4,967.16 and 1,121.50 is: 1,682.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,311.20 : 4,967.16 = 1,121.50 : x
  2. Step 2: Convert to fraction form
    3,311.20/4,967.16 = 1,121.50/x
  3. Step 3: Cross multiply
    3,311.20x = 4,967.16 × 1,121.50
  4. Step 4: Simplify right side
    3,311.20x = 5,570,669.94
  5. Step 5: Solve for x
    x = 5,570,669.94/3,311.20
  6. Step 6: Final answer
    x = 1,682.37

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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.