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Finding the Fourth Proportional to 386,456.40, 533,310.06 and 235,553.40

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Solution

The fourth proportional to 386,456.40, 533,310.06 and 235,553.40 is: 325,063.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,456.40 : 533,310.06 = 235,553.40 : x
  2. Step 2: Convert to fraction form
    386,456.40/533,310.06 = 235,553.40/x
  3. Step 3: Cross multiply
    386,456.40x = 533,310.06 × 235,553.40
  4. Step 4: Simplify right side
    386,456.40x = 125,622,997,887.20
  5. Step 5: Solve for x
    x = 125,622,997,887.20/386,456.40
  6. Step 6: Final answer
    x = 325,063.83

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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.