Home / 2,190.42-3,286.51-891.59

Finding the Fourth Proportional to 2,190.42, 3,286.51 and 891.59

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Solution

The fourth proportional to 2,190.42, 3,286.51 and 891.59 is: 1,337.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.42 : 3,286.51 = 891.59 : x
  2. Step 2: Convert to fraction form
    2,190.42/3,286.51 = 891.59/x
  3. Step 3: Cross multiply
    2,190.42x = 3,286.51 × 891.59
  4. Step 4: Simplify right side
    2,190.42x = 2,930,200.79
  5. Step 5: Solve for x
    x = 2,930,200.79/2,190.42
  6. Step 6: Final answer
    x = 1,337.73

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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.