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Finding the Fourth Proportional to 408,597.63, 612,896.45 and 128,136.75

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Solution

The fourth proportional to 408,597.63, 612,896.45 and 128,136.75 is: 192,205.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,597.63 : 612,896.45 = 128,136.75 : x
  2. Step 2: Convert to fraction form
    408,597.63/612,896.45 = 128,136.75/x
  3. Step 3: Cross multiply
    408,597.63x = 612,896.45 × 128,136.75
  4. Step 4: Simplify right side
    408,597.63x = 78,534,558,548.85
  5. Step 5: Solve for x
    x = 78,534,558,548.85/408,597.63
  6. Step 6: Final answer
    x = 192,205.13

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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.