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Finding the Fourth Proportional to 533,873,105.80, 800,809,658.70 and 419,211,320.20

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Solution

The fourth proportional to 533,873,105.80, 800,809,658.70 and 419,211,320.20 is: 628,816,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    533,873,105.80 : 800,809,658.70 = 419,211,320.20 : x
  2. Step 2: Convert to fraction form
    533,873,105.80/800,809,658.70 = 419,211,320.20/x
  3. Step 3: Cross multiply
    533,873,105.80x = 800,809,658.70 × 419,211,320.20
  4. Step 4: Simplify right side
    533,873,105.80x = 335,708,474,252,538,432
  5. Step 5: Solve for x
    x = 335,708,474,252,538,432/533,873,105.80
  6. Step 6: Final answer
    x = 628,816,980.30

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Double scale
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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.