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Finding the Fourth Proportional to 3,259.88, 4,887.39 and 1,961.05

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Solution

The fourth proportional to 3,259.88, 4,887.39 and 1,961.05 is: 2,940.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,259.88 : 4,887.39 = 1,961.05 : x
  2. Step 2: Convert to fraction form
    3,259.88/4,887.39 = 1,961.05/x
  3. Step 3: Cross multiply
    3,259.88x = 4,887.39 × 1,961.05
  4. Step 4: Simplify right side
    3,259.88x = 9,584,391.72
  5. Step 5: Solve for x
    x = 9,584,391.72/3,259.88
  6. Step 6: Final answer
    x = 2,940.11

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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.