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Finding the Fourth Proportional to 695,016, 959,115.60 and 393,210

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Solution

The fourth proportional to 695,016, 959,115.60 and 393,210 is: 542,626.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,016 : 959,115.60 = 393,210 : x
  2. Step 2: Convert to fraction form
    695,016/959,115.60 = 393,210/x
  3. Step 3: Cross multiply
    695,016x = 959,115.60 × 393,210
  4. Step 4: Simplify right side
    695,016x = 377,133,845,076
  5. Step 5: Solve for x
    x = 377,133,845,076/695,016
  6. Step 6: Final answer
    x = 542,626.13

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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.