Home / 2,231.85-3,079.68-1,287.54

Finding the Fourth Proportional to 2,231.85, 3,079.68 and 1,287.54

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Solution

The fourth proportional to 2,231.85, 3,079.68 and 1,287.54 is: 1,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.85 : 3,079.68 = 1,287.54 : x
  2. Step 2: Convert to fraction form
    2,231.85/3,079.68 = 1,287.54/x
  3. Step 3: Cross multiply
    2,231.85x = 3,079.68 × 1,287.54
  4. Step 4: Simplify right side
    2,231.85x = 3,965,211.19
  5. Step 5: Solve for x
    x = 3,965,211.19/2,231.85
  6. Step 6: Final answer
    x = 1,776.65

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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.