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Finding the Fourth Proportional to 280,097.20, 419,489.70 and 190,867.60

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Solution

The fourth proportional to 280,097.20, 419,489.70 and 190,867.60 is: 285,854.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,097.20 : 419,489.70 = 190,867.60 : x
  2. Step 2: Convert to fraction form
    280,097.20/419,489.70 = 190,867.60/x
  3. Step 3: Cross multiply
    280,097.20x = 419,489.70 × 190,867.60
  4. Step 4: Simplify right side
    280,097.20x = 80,066,992,263.72
  5. Step 5: Solve for x
    x = 80,066,992,263.72/280,097.20
  6. Step 6: Final answer
    x = 285,854.31

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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.