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Finding the Fourth Proportional to 393,451,037.20, 590,176,555.80 and 120,786,374.80

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Solution

The fourth proportional to 393,451,037.20, 590,176,555.80 and 120,786,374.80 is: 181,179,562.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,451,037.20 : 590,176,555.80 = 120,786,374.80 : x
  2. Step 2: Convert to fraction form
    393,451,037.20/590,176,555.80 = 120,786,374.80/x
  3. Step 3: Cross multiply
    393,451,037.20x = 590,176,555.80 × 120,786,374.80
  4. Step 4: Simplify right side
    393,451,037.20x = 71,285,286,667,031,904
  5. Step 5: Solve for x
    x = 71,285,286,667,031,904/393,451,037.20
  6. Step 6: Final answer
    x = 181,179,562.20

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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.