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Finding the Fourth Proportional to 408,039.90, 612,117.45 and 127,527.90

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Solution

The fourth proportional to 408,039.90, 612,117.45 and 127,527.90 is: 191,309.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,039.90 : 612,117.45 = 127,527.90 : x
  2. Step 2: Convert to fraction form
    408,039.90/612,117.45 = 127,527.90/x
  3. Step 3: Cross multiply
    408,039.90x = 612,117.45 × 127,527.90
  4. Step 4: Simplify right side
    408,039.90x = 78,062,052,951.86
  5. Step 5: Solve for x
    x = 78,062,052,951.86/408,039.90
  6. Step 6: Final answer
    x = 191,309.85

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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.