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Finding the Fourth Proportional to 220,857.40, 331,286.10 and 80,620.60

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Solution

The fourth proportional to 220,857.40, 331,286.10 and 80,620.60 is: 120,930.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,857.40 : 331,286.10 = 80,620.60 : x
  2. Step 2: Convert to fraction form
    220,857.40/331,286.10 = 80,620.60/x
  3. Step 3: Cross multiply
    220,857.40x = 331,286.10 × 80,620.60
  4. Step 4: Simplify right side
    220,857.40x = 26,708,484,153.66
  5. Step 5: Solve for x
    x = 26,708,484,153.66/220,857.40
  6. Step 6: Final answer
    x = 120,930.90

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1.5x scale

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.