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Finding the Fourth Proportional to 640,411.60, 960,617.40 and 197,179.60

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Solution

The fourth proportional to 640,411.60, 960,617.40 and 197,179.60 is: 295,769.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,411.60 : 960,617.40 = 197,179.60 : x
  2. Step 2: Convert to fraction form
    640,411.60/960,617.40 = 197,179.60/x
  3. Step 3: Cross multiply
    640,411.60x = 960,617.40 × 197,179.60
  4. Step 4: Simplify right side
    640,411.60x = 189,414,154,685.04
  5. Step 5: Solve for x
    x = 189,414,154,685.04/640,411.60
  6. Step 6: Final answer
    x = 295,769.40

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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.