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Finding the Fourth Proportional to 408,382.38, 612,573.57 and 127,921.50

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Solution

The fourth proportional to 408,382.38, 612,573.57 and 127,921.50 is: 191,882.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,382.38 : 612,573.57 = 127,921.50 : x
  2. Step 2: Convert to fraction form
    408,382.38/612,573.57 = 127,921.50/x
  3. Step 3: Cross multiply
    408,382.38x = 612,573.57 × 127,921.50
  4. Step 4: Simplify right side
    408,382.38x = 78,361,329,934.76
  5. Step 5: Solve for x
    x = 78,361,329,934.76/408,382.38
  6. Step 6: Final answer
    x = 191,882.25

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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.