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Finding the Fourth Proportional to 613,172.12, 919,756.50 and 192,479.48

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Solution

The fourth proportional to 613,172.12, 919,756.50 and 192,479.48 is: 288,718.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,172.12 : 919,756.50 = 192,479.48 : x
  2. Step 2: Convert to fraction form
    613,172.12/919,756.50 = 192,479.48/x
  3. Step 3: Cross multiply
    613,172.12x = 919,756.50 × 192,479.48
  4. Step 4: Simplify right side
    613,172.12x = 177,034,252,846.62
  5. Step 5: Solve for x
    x = 177,034,252,846.62/613,172.12
  6. Step 6: Final answer
    x = 288,718.69

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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.