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Finding the Fourth Proportional to 2,655.54, 3,979.31 and 2,422.08

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Solution

The fourth proportional to 2,655.54, 3,979.31 and 2,422.08 is: 3,629.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.54 : 3,979.31 = 2,422.08 : x
  2. Step 2: Convert to fraction form
    2,655.54/3,979.31 = 2,422.08/x
  3. Step 3: Cross multiply
    2,655.54x = 3,979.31 × 2,422.08
  4. Step 4: Simplify right side
    2,655.54x = 9,638,195.05
  5. Step 5: Solve for x
    x = 9,638,195.05/2,655.54
  6. Step 6: Final answer
    x = 3,629.47

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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.