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Finding the Fourth Proportional to 639,074.30, 958,545.81 and 339,236.60

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Solution

The fourth proportional to 639,074.30, 958,545.81 and 339,236.60 is: 508,820.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,074.30 : 958,545.81 = 339,236.60 : x
  2. Step 2: Convert to fraction form
    639,074.30/958,545.81 = 339,236.60/x
  3. Step 3: Cross multiply
    639,074.30x = 958,545.81 × 339,236.60
  4. Step 4: Simplify right side
    639,074.30x = 325,173,816,735.92
  5. Step 5: Solve for x
    x = 325,173,816,735.92/639,074.30
  6. Step 6: Final answer
    x = 508,820.05

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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.