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Finding the Fourth Proportional to 263,999.70, 395,999.55 and 86,524.65

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Solution

The fourth proportional to 263,999.70, 395,999.55 and 86,524.65 is: 129,786.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,999.70 : 395,999.55 = 86,524.65 : x
  2. Step 2: Convert to fraction form
    263,999.70/395,999.55 = 86,524.65/x
  3. Step 3: Cross multiply
    263,999.70x = 395,999.55 × 86,524.65
  4. Step 4: Simplify right side
    263,999.70x = 34,263,722,463.91
  5. Step 5: Solve for x
    x = 34,263,722,463.91/263,999.70
  6. Step 6: Final answer
    x = 129,786.98

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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.