Home / 2,191.04-3,286.56-891.80

Finding the Fourth Proportional to 2,191.04, 3,286.56 and 891.80

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Solution

The fourth proportional to 2,191.04, 3,286.56 and 891.80 is: 1,337.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.04 : 3,286.56 = 891.80 : x
  2. Step 2: Convert to fraction form
    2,191.04/3,286.56 = 891.80/x
  3. Step 3: Cross multiply
    2,191.04x = 3,286.56 × 891.80
  4. Step 4: Simplify right side
    2,191.04x = 2,930,954.21
  5. Step 5: Solve for x
    x = 2,930,954.21/2,191.04
  6. Step 6: Final answer
    x = 1,337.70

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Similar ratio
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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.