Home / 2,255.86-3,112.95-1,311.58

Finding the Fourth Proportional to 2,255.86, 3,112.95 and 1,311.58

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Solution

The fourth proportional to 2,255.86, 3,112.95 and 1,311.58 is: 1,809.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.86 : 3,112.95 = 1,311.58 : x
  2. Step 2: Convert to fraction form
    2,255.86/3,112.95 = 1,311.58/x
  3. Step 3: Cross multiply
    2,255.86x = 3,112.95 × 1,311.58
  4. Step 4: Simplify right side
    2,255.86x = 4,082,882.96
  5. Step 5: Solve for x
    x = 4,082,882.96/2,255.86
  6. Step 6: Final answer
    x = 1,809.90

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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.