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Finding the Fourth Proportional to 663,806,250.40, 996,465,202.80 and 391,330,544.80

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Solution

The fourth proportional to 663,806,250.40, 996,465,202.80 and 391,330,544.80 is: 587,441,396.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,806,250.40 : 996,465,202.80 = 391,330,544.80 : x
  2. Step 2: Convert to fraction form
    663,806,250.40/996,465,202.80 = 391,330,544.80/x
  3. Step 3: Cross multiply
    663,806,250.40x = 996,465,202.80 × 391,330,544.80
  4. Step 4: Simplify right side
    663,806,250.40x = 389,947,270,685,966,464
  5. Step 5: Solve for x
    x = 389,947,270,685,966,464/663,806,250.40
  6. Step 6: Final answer
    x = 587,441,396.42

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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.