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Finding the Fourth Proportional to 3,919.38, 5,879.11 and 997.69

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Solution

The fourth proportional to 3,919.38, 5,879.11 and 997.69 is: 1,496.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.38 : 5,879.11 = 997.69 : x
  2. Step 2: Convert to fraction form
    3,919.38/5,879.11 = 997.69/x
  3. Step 3: Cross multiply
    3,919.38x = 5,879.11 × 997.69
  4. Step 4: Simplify right side
    3,919.38x = 5,865,524.27
  5. Step 5: Solve for x
    x = 5,865,524.27/3,919.38
  6. Step 6: Final answer
    x = 1,496.54

Related Problems

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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.