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Finding the Fourth Proportional to 289,706.80, 434,538.60 and 121,183.60

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Solution

The fourth proportional to 289,706.80, 434,538.60 and 121,183.60 is: 181,766.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,706.80 : 434,538.60 = 121,183.60 : x
  2. Step 2: Convert to fraction form
    289,706.80/434,538.60 = 121,183.60/x
  3. Step 3: Cross multiply
    289,706.80x = 434,538.60 × 121,183.60
  4. Step 4: Simplify right side
    289,706.80x = 52,658,951,886.96
  5. Step 5: Solve for x
    x = 52,658,951,886.96/289,706.80
  6. Step 6: Final answer
    x = 181,766.36

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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.