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Finding the Fourth Proportional to 638,951.20, 958,426.80 and 195,661.60

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Solution

The fourth proportional to 638,951.20, 958,426.80 and 195,661.60 is: 293,492.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,951.20 : 958,426.80 = 195,661.60 : x
  2. Step 2: Convert to fraction form
    638,951.20/958,426.80 = 195,661.60/x
  3. Step 3: Cross multiply
    638,951.20x = 958,426.80 × 195,661.60
  4. Step 4: Simplify right side
    638,951.20x = 187,527,321,170.88
  5. Step 5: Solve for x
    x = 187,527,321,170.88/638,951.20
  6. Step 6: Final answer
    x = 293,492.40

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Similar ratio
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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.