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Finding the Fourth Proportional to 691,154.40, 953,677.40 and 385,163.64

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Solution

The fourth proportional to 691,154.40, 953,677.40 and 385,163.64 is: 531,461.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,154.40 : 953,677.40 = 385,163.64 : x
  2. Step 2: Convert to fraction form
    691,154.40/953,677.40 = 385,163.64/x
  3. Step 3: Cross multiply
    691,154.40x = 953,677.40 × 385,163.64
  4. Step 4: Simplify right side
    691,154.40x = 367,321,856,843.92
  5. Step 5: Solve for x
    x = 367,321,856,843.92/691,154.40
  6. Step 6: Final answer
    x = 531,461.36

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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.