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Finding the Fourth Proportional to 415,574.37, 623,396.93 and 131,188.85

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Solution

The fourth proportional to 415,574.37, 623,396.93 and 131,188.85 is: 196,794.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,574.37 : 623,396.93 = 131,188.85 : x
  2. Step 2: Convert to fraction form
    415,574.37/623,396.93 = 131,188.85/x
  3. Step 3: Cross multiply
    415,574.37x = 623,396.93 × 131,188.85
  4. Step 4: Simplify right side
    415,574.37x = 81,782,722,567.30
  5. Step 5: Solve for x
    x = 81,782,722,567.30/415,574.37
  6. Step 6: Final answer
    x = 196,794.43

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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.