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Finding the Fourth Proportional to 643,808,576.80, 965,964,807.60 and 234,906,061.60

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Solution

The fourth proportional to 643,808,576.80, 965,964,807.60 and 234,906,061.60 is: 352,451,018.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,808,576.80 : 965,964,807.60 = 234,906,061.60 : x
  2. Step 2: Convert to fraction form
    643,808,576.80/965,964,807.60 = 234,906,061.60/x
  3. Step 3: Cross multiply
    643,808,576.80x = 965,964,807.60 × 234,906,061.60
  4. Step 4: Simplify right side
    643,808,576.80x = 226,910,988,597,517,760
  5. Step 5: Solve for x
    x = 226,910,988,597,517,760/643,808,576.80
  6. Step 6: Final answer
    x = 352,451,018.48

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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.