Home / 2,212.86-3,311.58-1,818.12

Finding the Fourth Proportional to 2,212.86, 3,311.58 and 1,818.12

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Solution

The fourth proportional to 2,212.86, 3,311.58 and 1,818.12 is: 2,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.86 : 3,311.58 = 1,818.12 : x
  2. Step 2: Convert to fraction form
    2,212.86/3,311.58 = 1,818.12/x
  3. Step 3: Cross multiply
    2,212.86x = 3,311.58 × 1,818.12
  4. Step 4: Simplify right side
    2,212.86x = 6,020,849.83
  5. Step 5: Solve for x
    x = 6,020,849.83/2,212.86
  6. Step 6: Final answer
    x = 2,720.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.