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Finding the Fourth Proportional to 408,364.38, 612,546.57 and 127,903.50

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Solution

The fourth proportional to 408,364.38, 612,546.57 and 127,903.50 is: 191,855.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,364.38 : 612,546.57 = 127,903.50 : x
  2. Step 2: Convert to fraction form
    408,364.38/612,546.57 = 127,903.50/x
  3. Step 3: Cross multiply
    408,364.38x = 612,546.57 × 127,903.50
  4. Step 4: Simplify right side
    408,364.38x = 78,346,850,216.00
  5. Step 5: Solve for x
    x = 78,346,850,216.00/408,364.38
  6. Step 6: Final answer
    x = 191,855.25

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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.