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Finding the Fourth Proportional to 3,919.73, 5,879.66 and 998.06

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Solution

The fourth proportional to 3,919.73, 5,879.66 and 998.06 is: 1,497.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.73 : 5,879.66 = 998.06 : x
  2. Step 2: Convert to fraction form
    3,919.73/5,879.66 = 998.06/x
  3. Step 3: Cross multiply
    3,919.73x = 5,879.66 × 998.06
  4. Step 4: Simplify right side
    3,919.73x = 5,868,219.07
  5. Step 5: Solve for x
    x = 5,868,219.07/3,919.73
  6. Step 6: Final answer
    x = 1,497.10

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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.