Home / 2,772.28-4,157.88-1,311.22

Finding the Fourth Proportional to 2,772.28, 4,157.88 and 1,311.22

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Solution

The fourth proportional to 2,772.28, 4,157.88 and 1,311.22 is: 1,966.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,772.28 : 4,157.88 = 1,311.22 : x
  2. Step 2: Convert to fraction form
    2,772.28/4,157.88 = 1,311.22/x
  3. Step 3: Cross multiply
    2,772.28x = 4,157.88 × 1,311.22
  4. Step 4: Simplify right side
    2,772.28x = 5,451,895.41
  5. Step 5: Solve for x
    x = 5,451,895.41/2,772.28
  6. Step 6: Final answer
    x = 1,966.57

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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.