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Finding the Fourth Proportional to 3,201.63, 4,801.87 and 861.79

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Solution

The fourth proportional to 3,201.63, 4,801.87 and 861.79 is: 1,292.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,201.63 : 4,801.87 = 861.79 : x
  2. Step 2: Convert to fraction form
    3,201.63/4,801.87 = 861.79/x
  3. Step 3: Cross multiply
    3,201.63x = 4,801.87 × 861.79
  4. Step 4: Simplify right side
    3,201.63x = 4,138,203.55
  5. Step 5: Solve for x
    x = 4,138,203.55/3,201.63
  6. Step 6: Final answer
    x = 1,292.53

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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.