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Finding the Fourth Proportional to 3,183.86, 4,776.28 and 992.12

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Solution

The fourth proportional to 3,183.86, 4,776.28 and 992.12 is: 1,488.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,183.86 : 4,776.28 = 992.12 : x
  2. Step 2: Convert to fraction form
    3,183.86/4,776.28 = 992.12/x
  3. Step 3: Cross multiply
    3,183.86x = 4,776.28 × 992.12
  4. Step 4: Simplify right side
    3,183.86x = 4,738,642.91
  5. Step 5: Solve for x
    x = 4,738,642.91/3,183.86
  6. Step 6: Final answer
    x = 1,488.33

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Double scale
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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.