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Finding the Fourth Proportional to 269,311.80, 403,481.70 and 128,760.60

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Solution

The fourth proportional to 269,311.80, 403,481.70 and 128,760.60 is: 192,908.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,311.80 : 403,481.70 = 128,760.60 : x
  2. Step 2: Convert to fraction form
    269,311.80/403,481.70 = 128,760.60/x
  3. Step 3: Cross multiply
    269,311.80x = 403,481.70 × 128,760.60
  4. Step 4: Simplify right side
    269,311.80x = 51,952,545,781.02
  5. Step 5: Solve for x
    x = 51,952,545,781.02/269,311.80
  6. Step 6: Final answer
    x = 192,908.54

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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.