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Finding the Fourth Proportional to 4,788.72, 7,179.84 and 3,555.90

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Solution

The fourth proportional to 4,788.72, 7,179.84 and 3,555.90 is: 5,331.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,788.72 : 7,179.84 = 3,555.90 : x
  2. Step 2: Convert to fraction form
    4,788.72/7,179.84 = 3,555.90/x
  3. Step 3: Cross multiply
    4,788.72x = 7,179.84 × 3,555.90
  4. Step 4: Simplify right side
    4,788.72x = 25,530,793.06
  5. Step 5: Solve for x
    x = 25,530,793.06/4,788.72
  6. Step 6: Final answer
    x = 5,331.44

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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.