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Finding the Fourth Proportional to 445,409.40, 668,114.10 and 129,898.20

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Solution

The fourth proportional to 445,409.40, 668,114.10 and 129,898.20 is: 194,847.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,409.40 : 668,114.10 = 129,898.20 : x
  2. Step 2: Convert to fraction form
    445,409.40/668,114.10 = 129,898.20/x
  3. Step 3: Cross multiply
    445,409.40x = 668,114.10 × 129,898.20
  4. Step 4: Simplify right side
    445,409.40x = 86,786,818,984.62
  5. Step 5: Solve for x
    x = 86,786,818,984.62/445,409.40
  6. Step 6: Final answer
    x = 194,847.30

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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.