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Finding the Fourth Proportional to 543,999.90, 816,129.45 and 263,286.30

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Solution

The fourth proportional to 543,999.90, 816,129.45 and 263,286.30 is: 394,992.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,999.90 : 816,129.45 = 263,286.30 : x
  2. Step 2: Convert to fraction form
    543,999.90/816,129.45 = 263,286.30/x
  3. Step 3: Cross multiply
    543,999.90x = 816,129.45 × 263,286.30
  4. Step 4: Simplify right side
    543,999.90x = 214,875,703,211.54
  5. Step 5: Solve for x
    x = 214,875,703,211.54/543,999.90
  6. Step 6: Final answer
    x = 394,992.17

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1.5x scale

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.