Home / 1,311.26-1,810.98-1,229.88

Finding the Fourth Proportional to 1,311.26, 1,810.98 and 1,229.88

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Solution

The fourth proportional to 1,311.26, 1,810.98 and 1,229.88 is: 1,698.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.26 : 1,810.98 = 1,229.88 : x
  2. Step 2: Convert to fraction form
    1,311.26/1,810.98 = 1,229.88/x
  3. Step 3: Cross multiply
    1,311.26x = 1,810.98 × 1,229.88
  4. Step 4: Simplify right side
    1,311.26x = 2,227,288.08
  5. Step 5: Solve for x
    x = 2,227,288.08/1,311.26
  6. Step 6: Final answer
    x = 1,698.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.