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Finding the Fourth Proportional to 666,906.40, 1,000,359.60 and 628,415.20

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Solution

The fourth proportional to 666,906.40, 1,000,359.60 and 628,415.20 is: 942,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,906.40 : 1,000,359.60 = 628,415.20 : x
  2. Step 2: Convert to fraction form
    666,906.40/1,000,359.60 = 628,415.20/x
  3. Step 3: Cross multiply
    666,906.40x = 1,000,359.60 × 628,415.20
  4. Step 4: Simplify right side
    666,906.40x = 628,641,178,105.92
  5. Step 5: Solve for x
    x = 628,641,178,105.92/666,906.40
  6. Step 6: Final answer
    x = 942,622.80

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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.