Home / 1,311.30-1,967.40-1,266.30

Finding the Fourth Proportional to 1,311.30, 1,967.40 and 1,266.30

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Solution

The fourth proportional to 1,311.30, 1,967.40 and 1,266.30 is: 1,899.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.30 : 1,967.40 = 1,266.30 : x
  2. Step 2: Convert to fraction form
    1,311.30/1,967.40 = 1,266.30/x
  3. Step 3: Cross multiply
    1,311.30x = 1,967.40 × 1,266.30
  4. Step 4: Simplify right side
    1,311.30x = 2,491,318.62
  5. Step 5: Solve for x
    x = 2,491,318.62/1,311.30
  6. Step 6: Final answer
    x = 1,899.88

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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.