Home / 2,189.14-3,281.58-1,213.20

Finding the Fourth Proportional to 2,189.14, 3,281.58 and 1,213.20

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Solution

The fourth proportional to 2,189.14, 3,281.58 and 1,213.20 is: 1,818.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.14 : 3,281.58 = 1,213.20 : x
  2. Step 2: Convert to fraction form
    2,189.14/3,281.58 = 1,213.20/x
  3. Step 3: Cross multiply
    2,189.14x = 3,281.58 × 1,213.20
  4. Step 4: Simplify right side
    2,189.14x = 3,981,212.86
  5. Step 5: Solve for x
    x = 3,981,212.86/2,189.14
  6. Step 6: Final answer
    x = 1,818.62

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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.