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Finding the Fourth Proportional to 393,141.80, 589,712.70 and 168,609.80

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Solution

The fourth proportional to 393,141.80, 589,712.70 and 168,609.80 is: 252,914.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,141.80 : 589,712.70 = 168,609.80 : x
  2. Step 2: Convert to fraction form
    393,141.80/589,712.70 = 168,609.80/x
  3. Step 3: Cross multiply
    393,141.80x = 589,712.70 × 168,609.80
  4. Step 4: Simplify right side
    393,141.80x = 99,431,340,404.46
  5. Step 5: Solve for x
    x = 99,431,340,404.46/393,141.80
  6. Step 6: Final answer
    x = 252,914.70

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Similar ratio
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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.