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Finding the Fourth Proportional to 613,891.20, 920,937.60 and 193,065.60

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Solution

The fourth proportional to 613,891.20, 920,937.60 and 193,065.60 is: 289,630.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,891.20 : 920,937.60 = 193,065.60 : x
  2. Step 2: Convert to fraction form
    613,891.20/920,937.60 = 193,065.60/x
  3. Step 3: Cross multiply
    613,891.20x = 920,937.60 × 193,065.60
  4. Step 4: Simplify right side
    613,891.20x = 177,801,370,306.56
  5. Step 5: Solve for x
    x = 177,801,370,306.56/613,891.20
  6. Step 6: Final answer
    x = 289,630.10

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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.