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Finding the Fourth Proportional to 611,441.20, 917,161.80 and 168,209.20

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Solution

The fourth proportional to 611,441.20, 917,161.80 and 168,209.20 is: 252,313.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,441.20 : 917,161.80 = 168,209.20 : x
  2. Step 2: Convert to fraction form
    611,441.20/917,161.80 = 168,209.20/x
  3. Step 3: Cross multiply
    611,441.20x = 917,161.80 × 168,209.20
  4. Step 4: Simplify right side
    611,441.20x = 154,275,052,648.56
  5. Step 5: Solve for x
    x = 154,275,052,648.56/611,441.20
  6. Step 6: Final answer
    x = 252,313.80

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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.