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Finding the Fourth Proportional to 3,979.88, 5,495.55 and 3,320.19

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Solution

The fourth proportional to 3,979.88, 5,495.55 and 3,320.19 is: 4,584.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.88 : 5,495.55 = 3,320.19 : x
  2. Step 2: Convert to fraction form
    3,979.88/5,495.55 = 3,320.19/x
  3. Step 3: Cross multiply
    3,979.88x = 5,495.55 × 3,320.19
  4. Step 4: Simplify right side
    3,979.88x = 18,246,270.15
  5. Step 5: Solve for x
    x = 18,246,270.15/3,979.88
  6. Step 6: Final answer
    x = 4,584.63

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.