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Finding the Fourth Proportional to 2,826, 4,239.66 and 878.22

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Solution

The fourth proportional to 2,826, 4,239.66 and 878.22 is: 1,317.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,826 : 4,239.66 = 878.22 : x
  2. Step 2: Convert to fraction form
    2,826/4,239.66 = 878.22/x
  3. Step 3: Cross multiply
    2,826x = 4,239.66 × 878.22
  4. Step 4: Simplify right side
    2,826x = 3,723,354.21
  5. Step 5: Solve for x
    x = 3,723,354.21/2,826
  6. Step 6: Final answer
    x = 1,317.54

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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.