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Finding the Fourth Proportional to 2,499.64, 3,453.78 and 1,979.62

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Solution

The fourth proportional to 2,499.64, 3,453.78 and 1,979.62 is: 2,735.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,499.64 : 3,453.78 = 1,979.62 : x
  2. Step 2: Convert to fraction form
    2,499.64/3,453.78 = 1,979.62/x
  3. Step 3: Cross multiply
    2,499.64x = 3,453.78 × 1,979.62
  4. Step 4: Simplify right side
    2,499.64x = 6,837,171.96
  5. Step 5: Solve for x
    x = 6,837,171.96/2,499.64
  6. Step 6: Final answer
    x = 2,735.26

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Why These Related Problems?

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