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Finding the Fourth Proportional to 579,919,510.20, 869,879,265.30 and 321,930,492.60

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Solution

The fourth proportional to 579,919,510.20, 869,879,265.30 and 321,930,492.60 is: 482,895,738.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,919,510.20 : 869,879,265.30 = 321,930,492.60 : x
  2. Step 2: Convert to fraction form
    579,919,510.20/869,879,265.30 = 321,930,492.60/x
  3. Step 3: Cross multiply
    579,919,510.20x = 869,879,265.30 × 321,930,492.60
  4. Step 4: Simplify right side
    579,919,510.20x = 280,040,660,380,555,104
  5. Step 5: Solve for x
    x = 280,040,660,380,555,104/579,919,510.20
  6. Step 6: Final answer
    x = 482,895,738.90

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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.