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Finding the Fourth Proportional to 685,168.14, 945,507.81 and 379,245.12

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Solution

The fourth proportional to 685,168.14, 945,507.81 and 379,245.12 is: 523,344.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,168.14 : 945,507.81 = 379,245.12 : x
  2. Step 2: Convert to fraction form
    685,168.14/945,507.81 = 379,245.12/x
  3. Step 3: Cross multiply
    685,168.14x = 945,507.81 × 379,245.12
  4. Step 4: Simplify right side
    685,168.14x = 358,579,222,864.39
  5. Step 5: Solve for x
    x = 358,579,222,864.39/685,168.14
  6. Step 6: Final answer
    x = 523,344.86

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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.