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Finding the Fourth Proportional to 392,204,286.80, 586,794,775.80 and 256,155,390.80

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Solution

The fourth proportional to 392,204,286.80, 586,794,775.80 and 256,155,390.80 is: 383,245,798.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,204,286.80 : 586,794,775.80 = 256,155,390.80 : x
  2. Step 2: Convert to fraction form
    392,204,286.80/586,794,775.80 = 256,155,390.80/x
  3. Step 3: Cross multiply
    392,204,286.80x = 586,794,775.80 × 256,155,390.80
  4. Step 4: Simplify right side
    392,204,286.80x = 150,310,645,114,447,392
  5. Step 5: Solve for x
    x = 150,310,645,114,447,392/392,204,286.80
  6. Step 6: Final answer
    x = 383,245,798.61

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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.