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Finding the Fourth Proportional to 695,355.78, 959,481.36 and 405,015.12

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Solution

The fourth proportional to 695,355.78, 959,481.36 and 405,015.12 is: 558,857.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,355.78 : 959,481.36 = 405,015.12 : x
  2. Step 2: Convert to fraction form
    695,355.78/959,481.36 = 405,015.12/x
  3. Step 3: Cross multiply
    695,355.78x = 959,481.36 × 405,015.12
  4. Step 4: Simplify right side
    695,355.78x = 388,604,458,158.16
  5. Step 5: Solve for x
    x = 388,604,458,158.16/695,355.78
  6. Step 6: Final answer
    x = 558,857.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.