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Finding the Fourth Proportional to 408,373.38, 612,560.07 and 127,912.50

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Solution

The fourth proportional to 408,373.38, 612,560.07 and 127,912.50 is: 191,868.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,373.38 : 612,560.07 = 127,912.50 : x
  2. Step 2: Convert to fraction form
    408,373.38/612,560.07 = 127,912.50/x
  3. Step 3: Cross multiply
    408,373.38x = 612,560.07 × 127,912.50
  4. Step 4: Simplify right side
    408,373.38x = 78,354,089,953.88
  5. Step 5: Solve for x
    x = 78,354,089,953.88/408,373.38
  6. Step 6: Final answer
    x = 191,868.75

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Similar ratio
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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.