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Finding the Fourth Proportional to 444,391.76, 666,685.56 and 128,861.84

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Solution

The fourth proportional to 444,391.76, 666,685.56 and 128,861.84 is: 193,321.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    444,391.76 : 666,685.56 = 128,861.84 : x
  2. Step 2: Convert to fraction form
    444,391.76/666,685.56 = 128,861.84/x
  3. Step 3: Cross multiply
    444,391.76x = 666,685.56 × 128,861.84
  4. Step 4: Simplify right side
    444,391.76x = 85,910,327,963.03
  5. Step 5: Solve for x
    x = 85,910,327,963.03/444,391.76
  6. Step 6: Final answer
    x = 193,321.15

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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.