Home / 2,771.90-4,158.36-1,311.05

Finding the Fourth Proportional to 2,771.90, 4,158.36 and 1,311.05

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Solution

The fourth proportional to 2,771.90, 4,158.36 and 1,311.05 is: 1,966.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,771.90 : 4,158.36 = 1,311.05 : x
  2. Step 2: Convert to fraction form
    2,771.90/4,158.36 = 1,311.05/x
  3. Step 3: Cross multiply
    2,771.90x = 4,158.36 × 1,311.05
  4. Step 4: Simplify right side
    2,771.90x = 5,451,828.27
  5. Step 5: Solve for x
    x = 5,451,828.27/2,771.90
  6. Step 6: Final answer
    x = 1,966.82

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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.