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Finding the Fourth Proportional to 2,543.83, 3,815.37 and 878.22

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Solution

The fourth proportional to 2,543.83, 3,815.37 and 878.22 is: 1,317.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.83 : 3,815.37 = 878.22 : x
  2. Step 2: Convert to fraction form
    2,543.83/3,815.37 = 878.22/x
  3. Step 3: Cross multiply
    2,543.83x = 3,815.37 × 878.22
  4. Step 4: Simplify right side
    2,543.83x = 3,350,734.24
  5. Step 5: Solve for x
    x = 3,350,734.24/2,543.83
  6. Step 6: Final answer
    x = 1,317.20

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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.