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Finding the Fourth Proportional to 408,000.40, 612,000.60 and 127,517.20

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Solution

The fourth proportional to 408,000.40, 612,000.60 and 127,517.20 is: 191,275.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,000.40 : 612,000.60 = 127,517.20 : x
  2. Step 2: Convert to fraction form
    408,000.40/612,000.60 = 127,517.20/x
  3. Step 3: Cross multiply
    408,000.40x = 612,000.60 × 127,517.20
  4. Step 4: Simplify right side
    408,000.40x = 78,040,602,910.32
  5. Step 5: Solve for x
    x = 78,040,602,910.32/408,000.40
  6. Step 6: Final answer
    x = 191,275.80

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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.