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Finding the Fourth Proportional to 691,149.11, 953,708.78 and 385,202.39

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Solution

The fourth proportional to 691,149.11, 953,708.78 and 385,202.39 is: 531,536.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,149.11 : 953,708.78 = 385,202.39 : x
  2. Step 2: Convert to fraction form
    691,149.11/953,708.78 = 385,202.39/x
  3. Step 3: Cross multiply
    691,149.11x = 953,708.78 × 385,202.39
  4. Step 4: Simplify right side
    691,149.11x = 367,370,897,614.45
  5. Step 5: Solve for x
    x = 367,370,897,614.45/691,149.11
  6. Step 6: Final answer
    x = 531,536.39

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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.