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Finding the Fourth Proportional to 2,811, 3,879.18 and 1,552.08

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Solution

The fourth proportional to 2,811, 3,879.18 and 1,552.08 is: 2,141.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811 : 3,879.18 = 1,552.08 : x
  2. Step 2: Convert to fraction form
    2,811/3,879.18 = 1,552.08/x
  3. Step 3: Cross multiply
    2,811x = 3,879.18 × 1,552.08
  4. Step 4: Simplify right side
    2,811x = 6,020,797.69
  5. Step 5: Solve for x
    x = 6,020,797.69/2,811
  6. Step 6: Final answer
    x = 2,141.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.