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Finding the Fourth Proportional to 343,441,447.80, 515,162,171.70 and 205,691,940.60

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Solution

The fourth proportional to 343,441,447.80, 515,162,171.70 and 205,691,940.60 is: 308,537,910.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,441,447.80 : 515,162,171.70 = 205,691,940.60 : x
  2. Step 2: Convert to fraction form
    343,441,447.80/515,162,171.70 = 205,691,940.60/x
  3. Step 3: Cross multiply
    343,441,447.80x = 515,162,171.70 × 205,691,940.60
  4. Step 4: Simplify right side
    343,441,447.80x = 105,964,706,820,683,392
  5. Step 5: Solve for x
    x = 105,964,706,820,683,392/343,441,447.80
  6. Step 6: Final answer
    x = 308,537,910.90

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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.