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Finding the Fourth Proportional to 3,610.88, 5,420.88 and 2,789.72

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Solution

The fourth proportional to 3,610.88, 5,420.88 and 2,789.72 is: 4,188.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,610.88 : 5,420.88 = 2,789.72 : x
  2. Step 2: Convert to fraction form
    3,610.88/5,420.88 = 2,789.72/x
  3. Step 3: Cross multiply
    3,610.88x = 5,420.88 × 2,789.72
  4. Step 4: Simplify right side
    3,610.88x = 15,122,737.35
  5. Step 5: Solve for x
    x = 15,122,737.35/3,610.88
  6. Step 6: Final answer
    x = 4,188.10

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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.