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Finding the Fourth Proportional to 643,807,640.80, 965,963,403.60 and 234,905,125.60

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Solution

The fourth proportional to 643,807,640.80, 965,963,403.60 and 234,905,125.60 is: 352,449,614.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,807,640.80 : 965,963,403.60 = 234,905,125.60 : x
  2. Step 2: Convert to fraction form
    643,807,640.80/965,963,403.60 = 234,905,125.60/x
  3. Step 3: Cross multiply
    643,807,640.80x = 965,963,403.60 × 234,905,125.60
  4. Step 4: Simplify right side
    643,807,640.80x = 226,909,754,647,661,504
  5. Step 5: Solve for x
    x = 226,909,754,647,661,504/643,807,640.80
  6. Step 6: Final answer
    x = 352,449,614.24

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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.