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Finding the Fourth Proportional to 661,639.20, 992,458.80 and 451,687.20

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Solution

The fourth proportional to 661,639.20, 992,458.80 and 451,687.20 is: 677,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,639.20 : 992,458.80 = 451,687.20 : x
  2. Step 2: Convert to fraction form
    661,639.20/992,458.80 = 451,687.20/x
  3. Step 3: Cross multiply
    661,639.20x = 992,458.80 × 451,687.20
  4. Step 4: Simplify right side
    661,639.20x = 448,280,936,487.36
  5. Step 5: Solve for x
    x = 448,280,936,487.36/661,639.20
  6. Step 6: Final answer
    x = 677,530.80

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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.