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Finding the Fourth Proportional to 256,643,578.60, 384,965,367.90 and 154,606,906.60

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Solution

The fourth proportional to 256,643,578.60, 384,965,367.90 and 154,606,906.60 is: 231,910,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,643,578.60 : 384,965,367.90 = 154,606,906.60 : x
  2. Step 2: Convert to fraction form
    256,643,578.60/384,965,367.90 = 154,606,906.60/x
  3. Step 3: Cross multiply
    256,643,578.60x = 384,965,367.90 × 154,606,906.60
  4. Step 4: Simplify right side
    256,643,578.60x = 59,518,304,679,149,936
  5. Step 5: Solve for x
    x = 59,518,304,679,149,936/256,643,578.60
  6. Step 6: Final answer
    x = 231,910,359.90

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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.