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Finding the Fourth Proportional to 220,890.80, 331,336.20 and 206,019.20

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Solution

The fourth proportional to 220,890.80, 331,336.20 and 206,019.20 is: 309,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,890.80 : 331,336.20 = 206,019.20 : x
  2. Step 2: Convert to fraction form
    220,890.80/331,336.20 = 206,019.20/x
  3. Step 3: Cross multiply
    220,890.80x = 331,336.20 × 206,019.20
  4. Step 4: Simplify right side
    220,890.80x = 68,261,618,855.04
  5. Step 5: Solve for x
    x = 68,261,618,855.04/220,890.80
  6. Step 6: Final answer
    x = 309,028.80

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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.