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Finding the Fourth Proportional to 820,653.20, 1,228,906.20 and 538,643.60

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Solution

The fourth proportional to 820,653.20, 1,228,906.20 and 538,643.60 is: 806,604.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,653.20 : 1,228,906.20 = 538,643.60 : x
  2. Step 2: Convert to fraction form
    820,653.20/1,228,906.20 = 538,643.60/x
  3. Step 3: Cross multiply
    820,653.20x = 1,228,906.20 × 538,643.60
  4. Step 4: Simplify right side
    820,653.20x = 661,942,459,630.32
  5. Step 5: Solve for x
    x = 661,942,459,630.32/820,653.20
  6. Step 6: Final answer
    x = 806,604.37

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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.