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Finding the Fourth Proportional to 699,036.36, 964,661.00 and 393,112.64

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Solution

The fourth proportional to 699,036.36, 964,661.00 and 393,112.64 is: 542,490.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,036.36 : 964,661.00 = 393,112.64 : x
  2. Step 2: Convert to fraction form
    699,036.36/964,661.00 = 393,112.64/x
  3. Step 3: Cross multiply
    699,036.36x = 964,661.00 × 393,112.64
  4. Step 4: Simplify right side
    699,036.36x = 379,220,434,335.30
  5. Step 5: Solve for x
    x = 379,220,434,335.30/699,036.36
  6. Step 6: Final answer
    x = 542,490.29

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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.