Home / 3,311.64-4,965.90-1,119.78

Finding the Fourth Proportional to 3,311.64, 4,965.90 and 1,119.78

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Solution

The fourth proportional to 3,311.64, 4,965.90 and 1,119.78 is: 1,679.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,311.64 : 4,965.90 = 1,119.78 : x
  2. Step 2: Convert to fraction form
    3,311.64/4,965.90 = 1,119.78/x
  3. Step 3: Cross multiply
    3,311.64x = 4,965.90 × 1,119.78
  4. Step 4: Simplify right side
    3,311.64x = 5,560,715.50
  5. Step 5: Solve for x
    x = 5,560,715.50/3,311.64
  6. Step 6: Final answer
    x = 1,679.14

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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.