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Finding the Fourth Proportional to 522,858.60, 784,806.30 and 256,919.40

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Solution

The fourth proportional to 522,858.60, 784,806.30 and 256,919.40 is: 385,633.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,858.60 : 784,806.30 = 256,919.40 : x
  2. Step 2: Convert to fraction form
    522,858.60/784,806.30 = 256,919.40/x
  3. Step 3: Cross multiply
    522,858.60x = 784,806.30 × 256,919.40
  4. Step 4: Simplify right side
    522,858.60x = 201,631,963,712.22
  5. Step 5: Solve for x
    x = 201,631,963,712.22/522,858.60
  6. Step 6: Final answer
    x = 385,633.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.