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Finding the Fourth Proportional to 215,843.40, 323,765.10 and 196,489.80

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Solution

The fourth proportional to 215,843.40, 323,765.10 and 196,489.80 is: 294,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,843.40 : 323,765.10 = 196,489.80 : x
  2. Step 2: Convert to fraction form
    215,843.40/323,765.10 = 196,489.80/x
  3. Step 3: Cross multiply
    215,843.40x = 323,765.10 × 196,489.80
  4. Step 4: Simplify right side
    215,843.40x = 63,616,539,745.98
  5. Step 5: Solve for x
    x = 63,616,539,745.98/215,843.40
  6. Step 6: Final answer
    x = 294,734.70

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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.