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Finding the Fourth Proportional to 629,857,413.20, 944,786,119.80 and 220,860,419.60

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Solution

The fourth proportional to 629,857,413.20, 944,786,119.80 and 220,860,419.60 is: 331,290,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,857,413.20 : 944,786,119.80 = 220,860,419.60 : x
  2. Step 2: Convert to fraction form
    629,857,413.20/944,786,119.80 = 220,860,419.60/x
  3. Step 3: Cross multiply
    629,857,413.20x = 944,786,119.80 × 220,860,419.60
  4. Step 4: Simplify right side
    629,857,413.20x = 208,665,858,851,283,840
  5. Step 5: Solve for x
    x = 208,665,858,851,283,840/629,857,413.20
  6. Step 6: Final answer
    x = 331,290,629.40

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Double scale
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Similar ratio
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1.5x scale

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.