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Finding the Fourth Proportional to 289,108.74, 399,084.80 and 195,995.87

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Solution

The fourth proportional to 289,108.74, 399,084.80 and 195,995.87 is: 270,552.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,108.74 : 399,084.80 = 195,995.87 : x
  2. Step 2: Convert to fraction form
    289,108.74/399,084.80 = 195,995.87/x
  3. Step 3: Cross multiply
    289,108.74x = 399,084.80 × 195,995.87
  4. Step 4: Simplify right side
    289,108.74x = 78,218,969,604.37
  5. Step 5: Solve for x
    x = 78,218,969,604.37/289,108.74
  6. Step 6: Final answer
    x = 270,552.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.