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Finding the Fourth Proportional to 720,882.20, 994,777.70 and 398,571.04

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Solution

The fourth proportional to 720,882.20, 994,777.70 and 398,571.04 is: 550,006.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,882.20 : 994,777.70 = 398,571.04 : x
  2. Step 2: Convert to fraction form
    720,882.20/994,777.70 = 398,571.04/x
  3. Step 3: Cross multiply
    720,882.20x = 994,777.70 × 398,571.04
  4. Step 4: Simplify right side
    720,882.20x = 396,489,577,978.01
  5. Step 5: Solve for x
    x = 396,489,577,978.01/720,882.20
  6. Step 6: Final answer
    x = 550,006.06

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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.