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Finding the Fourth Proportional to 645,963.40, 968,945.10 and 196,680.70

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Solution

The fourth proportional to 645,963.40, 968,945.10 and 196,680.70 is: 295,021.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,963.40 : 968,945.10 = 196,680.70 : x
  2. Step 2: Convert to fraction form
    645,963.40/968,945.10 = 196,680.70/x
  3. Step 3: Cross multiply
    645,963.40x = 968,945.10 × 196,680.70
  4. Step 4: Simplify right side
    645,963.40x = 190,572,800,529.57
  5. Step 5: Solve for x
    x = 190,572,800,529.57/645,963.40
  6. Step 6: Final answer
    x = 295,021.05

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Double scale
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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.