Home / 2,255.64-3,112.38-1,311.54

Finding the Fourth Proportional to 2,255.64, 3,112.38 and 1,311.54

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Solution

The fourth proportional to 2,255.64, 3,112.38 and 1,311.54 is: 1,809.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.64 : 3,112.38 = 1,311.54 : x
  2. Step 2: Convert to fraction form
    2,255.64/3,112.38 = 1,311.54/x
  3. Step 3: Cross multiply
    2,255.64x = 3,112.38 × 1,311.54
  4. Step 4: Simplify right side
    2,255.64x = 4,082,010.87
  5. Step 5: Solve for x
    x = 4,082,010.87/2,255.64
  6. Step 6: Final answer
    x = 1,809.69

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1.5x scale

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.