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Finding the Fourth Proportional to 7,255.78, 10,879.17 and 3,355.18

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Solution

The fourth proportional to 7,255.78, 10,879.17 and 3,355.18 is: 5,030.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,255.78 : 10,879.17 = 3,355.18 : x
  2. Step 2: Convert to fraction form
    7,255.78/10,879.17 = 3,355.18/x
  3. Step 3: Cross multiply
    7,255.78x = 10,879.17 × 3,355.18
  4. Step 4: Simplify right side
    7,255.78x = 36,501,573.60
  5. Step 5: Solve for x
    x = 36,501,573.60/7,255.78
  6. Step 6: Final answer
    x = 5,030.69

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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.