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Finding the Fourth Proportional to 512,491.20, 768,736.80 and 196,955.70

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Solution

The fourth proportional to 512,491.20, 768,736.80 and 196,955.70 is: 295,433.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,491.20 : 768,736.80 = 196,955.70 : x
  2. Step 2: Convert to fraction form
    512,491.20/768,736.80 = 196,955.70/x
  3. Step 3: Cross multiply
    512,491.20x = 768,736.80 × 196,955.70
  4. Step 4: Simplify right side
    512,491.20x = 151,407,094,559.76
  5. Step 5: Solve for x
    x = 151,407,094,559.76/512,491.20
  6. Step 6: Final answer
    x = 295,433.55

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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.