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Finding the Fourth Proportional to 691,505.68, 954,190.92 and 385,507.12

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Solution

The fourth proportional to 691,505.68, 954,190.92 and 385,507.12 is: 531,951.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,505.68 : 954,190.92 = 385,507.12 : x
  2. Step 2: Convert to fraction form
    691,505.68/954,190.92 = 385,507.12/x
  3. Step 3: Cross multiply
    691,505.68x = 954,190.92 × 385,507.12
  4. Step 4: Simplify right side
    691,505.68x = 367,847,393,499.35
  5. Step 5: Solve for x
    x = 367,847,393,499.35/691,505.68
  6. Step 6: Final answer
    x = 531,951.37

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.