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Finding the Fourth Proportional to 625,245.96, 863,035.62 and 398,891.28

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Solution

The fourth proportional to 625,245.96, 863,035.62 and 398,891.28 is: 550,595.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,245.96 : 863,035.62 = 398,891.28 : x
  2. Step 2: Convert to fraction form
    625,245.96/863,035.62 = 398,891.28/x
  3. Step 3: Cross multiply
    625,245.96x = 863,035.62 × 398,891.28
  4. Step 4: Simplify right side
    625,245.96x = 344,257,383,147.39
  5. Step 5: Solve for x
    x = 344,257,383,147.39/625,245.96
  6. Step 6: Final answer
    x = 550,595.13

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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.