Home / 765,049.62-1,055,753.78-420,865.43

Finding the Fourth Proportional to 765,049.62, 1,055,753.78 and 420,865.43

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Solution

The fourth proportional to 765,049.62, 1,055,753.78 and 420,865.43 is: 580,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,049.62 : 1,055,753.78 = 420,865.43 : x
  2. Step 2: Convert to fraction form
    765,049.62/1,055,753.78 = 420,865.43/x
  3. Step 3: Cross multiply
    765,049.62x = 1,055,753.78 × 420,865.43
  4. Step 4: Simplify right side
    765,049.62x = 444,330,261,210.73
  5. Step 5: Solve for x
    x = 444,330,261,210.73/765,049.62
  6. Step 6: Final answer
    x = 580,786.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.