Home / 3,139.38-4,709.07-1,191.12

Finding the Fourth Proportional to 3,139.38, 4,709.07 and 1,191.12

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Solution

The fourth proportional to 3,139.38, 4,709.07 and 1,191.12 is: 1,786.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.38 : 4,709.07 = 1,191.12 : x
  2. Step 2: Convert to fraction form
    3,139.38/4,709.07 = 1,191.12/x
  3. Step 3: Cross multiply
    3,139.38x = 4,709.07 × 1,191.12
  4. Step 4: Simplify right side
    3,139.38x = 5,609,067.46
  5. Step 5: Solve for x
    x = 5,609,067.46/3,139.38
  6. Step 6: Final answer
    x = 1,786.68

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Half scale
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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.