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Finding the Fourth Proportional to 645,097.66, 888,921.88 and 499,015.97

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Solution

The fourth proportional to 645,097.66, 888,921.88 and 499,015.97 is: 687,626.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,097.66 : 888,921.88 = 499,015.97 : x
  2. Step 2: Convert to fraction form
    645,097.66/888,921.88 = 499,015.97/x
  3. Step 3: Cross multiply
    645,097.66x = 888,921.88 × 499,015.97
  4. Step 4: Simplify right side
    645,097.66x = 443,586,214,202.42
  5. Step 5: Solve for x
    x = 443,586,214,202.42/645,097.66
  6. Step 6: Final answer
    x = 687,626.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.