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Finding the Fourth Proportional to 411,939.60, 617,909.40 and 190,323.60

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Solution

The fourth proportional to 411,939.60, 617,909.40 and 190,323.60 is: 285,485.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,939.60 : 617,909.40 = 190,323.60 : x
  2. Step 2: Convert to fraction form
    411,939.60/617,909.40 = 190,323.60/x
  3. Step 3: Cross multiply
    411,939.60x = 617,909.40 × 190,323.60
  4. Step 4: Simplify right side
    411,939.60x = 117,602,741,481.84
  5. Step 5: Solve for x
    x = 117,602,741,481.84/411,939.60
  6. Step 6: Final answer
    x = 285,485.40

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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.