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Finding the Fourth Proportional to 408,066.20, 612,099.30 and 289,093.40

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Solution

The fourth proportional to 408,066.20, 612,099.30 and 289,093.40 is: 433,640.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,066.20 : 612,099.30 = 289,093.40 : x
  2. Step 2: Convert to fraction form
    408,066.20/612,099.30 = 289,093.40/x
  3. Step 3: Cross multiply
    408,066.20x = 612,099.30 × 289,093.40
  4. Step 4: Simplify right side
    408,066.20x = 176,953,867,774.62
  5. Step 5: Solve for x
    x = 176,953,867,774.62/408,066.20
  6. Step 6: Final answer
    x = 433,640.10

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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.