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Finding the Fourth Proportional to 579,919,509.20, 869,879,263.80 and 321,930,491.60

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Solution

The fourth proportional to 579,919,509.20, 869,879,263.80 and 321,930,491.60 is: 482,895,737.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,919,509.20 : 869,879,263.80 = 321,930,491.60 : x
  2. Step 2: Convert to fraction form
    579,919,509.20/869,879,263.80 = 321,930,491.60/x
  3. Step 3: Cross multiply
    579,919,509.20x = 869,879,263.80 × 321,930,491.60
  4. Step 4: Simplify right side
    579,919,509.20x = 280,040,659,027,780,096
  5. Step 5: Solve for x
    x = 280,040,659,027,780,096/579,919,509.20
  6. Step 6: Final answer
    x = 482,895,737.40

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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.