Home / 2,191.28-3,286.91-730.10

Finding the Fourth Proportional to 2,191.28, 3,286.91 and 730.10

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Solution

The fourth proportional to 2,191.28, 3,286.91 and 730.10 is: 1,095.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.28 : 3,286.91 = 730.10 : x
  2. Step 2: Convert to fraction form
    2,191.28/3,286.91 = 730.10/x
  3. Step 3: Cross multiply
    2,191.28x = 3,286.91 × 730.10
  4. Step 4: Simplify right side
    2,191.28x = 2,399,752.91
  5. Step 5: Solve for x
    x = 2,399,752.91/2,191.28
  6. Step 6: Final answer
    x = 1,095.14

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Double scale
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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.