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Finding the Fourth Proportional to 720,882.45, 994,800.15 and 398,584.26

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Solution

The fourth proportional to 720,882.45, 994,800.15 and 398,584.26 is: 550,036.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,882.45 : 994,800.15 = 398,584.26 : x
  2. Step 2: Convert to fraction form
    720,882.45/994,800.15 = 398,584.26/x
  3. Step 3: Cross multiply
    720,882.45x = 994,800.15 × 398,584.26
  4. Step 4: Simplify right side
    720,882.45x = 396,511,681,635.64
  5. Step 5: Solve for x
    x = 396,511,681,635.64/720,882.45
  6. Step 6: Final answer
    x = 550,036.53

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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.