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Finding the Fourth Proportional to 2,919.69, 4,375.53 and 1,879.11

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Solution

The fourth proportional to 2,919.69, 4,375.53 and 1,879.11 is: 2,816.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.69 : 4,375.53 = 1,879.11 : x
  2. Step 2: Convert to fraction form
    2,919.69/4,375.53 = 1,879.11/x
  3. Step 3: Cross multiply
    2,919.69x = 4,375.53 × 1,879.11
  4. Step 4: Simplify right side
    2,919.69x = 8,222,102.18
  5. Step 5: Solve for x
    x = 8,222,102.18/2,919.69
  6. Step 6: Final answer
    x = 2,816.09

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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.