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Finding the Fourth Proportional to 274,171.20, 411,256.80 and 190,190.40

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Solution

The fourth proportional to 274,171.20, 411,256.80 and 190,190.40 is: 285,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,171.20 : 411,256.80 = 190,190.40 : x
  2. Step 2: Convert to fraction form
    274,171.20/411,256.80 = 190,190.40/x
  3. Step 3: Cross multiply
    274,171.20x = 411,256.80 × 190,190.40
  4. Step 4: Simplify right side
    274,171.20x = 78,217,095,294.72
  5. Step 5: Solve for x
    x = 78,217,095,294.72/274,171.20
  6. Step 6: Final answer
    x = 285,285.60

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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.