Home / 820,121.90-1,231,104.45-633,958.70

Finding the Fourth Proportional to 820,121.90, 1,231,104.45 and 633,958.70

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Solution

The fourth proportional to 820,121.90, 1,231,104.45 and 633,958.70 is: 951,650.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,121.90 : 1,231,104.45 = 633,958.70 : x
  2. Step 2: Convert to fraction form
    820,121.90/1,231,104.45 = 633,958.70/x
  3. Step 3: Cross multiply
    820,121.90x = 1,231,104.45 × 633,958.70
  4. Step 4: Simplify right side
    820,121.90x = 780,469,376,686.22
  5. Step 5: Solve for x
    x = 780,469,376,686.22/820,121.90
  6. Step 6: Final answer
    x = 951,650.45

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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.