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Finding the Fourth Proportional to 207,561.20, 311,341.80 and 189,190.40

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Solution

The fourth proportional to 207,561.20, 311,341.80 and 189,190.40 is: 283,785.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,561.20 : 311,341.80 = 189,190.40 : x
  2. Step 2: Convert to fraction form
    207,561.20/311,341.80 = 189,190.40/x
  3. Step 3: Cross multiply
    207,561.20x = 311,341.80 × 189,190.40
  4. Step 4: Simplify right side
    207,561.20x = 58,902,879,678.72
  5. Step 5: Solve for x
    x = 58,902,879,678.72/207,561.20
  6. Step 6: Final answer
    x = 283,785.60

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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.