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Finding the Fourth Proportional to 639,529,203.60, 959,293,805.40 and 367,431,411.60

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Solution

The fourth proportional to 639,529,203.60, 959,293,805.40 and 367,431,411.60 is: 551,147,117.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,529,203.60 : 959,293,805.40 = 367,431,411.60 : x
  2. Step 2: Convert to fraction form
    639,529,203.60/959,293,805.40 = 367,431,411.60/x
  3. Step 3: Cross multiply
    639,529,203.60x = 959,293,805.40 × 367,431,411.60
  4. Step 4: Simplify right side
    639,529,203.60x = 352,474,677,057,257,728
  5. Step 5: Solve for x
    x = 352,474,677,057,257,728/639,529,203.60
  6. Step 6: Final answer
    x = 551,147,117.40

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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.