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Finding the Fourth Proportional to 408,065.60, 612,098.40 and 347,704.40

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Solution

The fourth proportional to 408,065.60, 612,098.40 and 347,704.40 is: 521,556.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,065.60 : 612,098.40 = 347,704.40 : x
  2. Step 2: Convert to fraction form
    408,065.60/612,098.40 = 347,704.40/x
  3. Step 3: Cross multiply
    408,065.60x = 612,098.40 × 347,704.40
  4. Step 4: Simplify right side
    408,065.60x = 212,829,306,912.96
  5. Step 5: Solve for x
    x = 212,829,306,912.96/408,065.60
  6. Step 6: Final answer
    x = 521,556.60

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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.