Home / 2,255.13-3,112.05-1,311.11

Finding the Fourth Proportional to 2,255.13, 3,112.05 and 1,311.11

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Solution

The fourth proportional to 2,255.13, 3,112.05 and 1,311.11 is: 1,809.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.13 : 3,112.05 = 1,311.11 : x
  2. Step 2: Convert to fraction form
    2,255.13/3,112.05 = 1,311.11/x
  3. Step 3: Cross multiply
    2,255.13x = 3,112.05 × 1,311.11
  4. Step 4: Simplify right side
    2,255.13x = 4,080,239.88
  5. Step 5: Solve for x
    x = 4,080,239.88/2,255.13
  6. Step 6: Final answer
    x = 1,809.31

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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.