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Finding the Fourth Proportional to 445,793.60, 668,690.40 and 256,836.80

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Solution

The fourth proportional to 445,793.60, 668,690.40 and 256,836.80 is: 385,255.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,793.60 : 668,690.40 = 256,836.80 : x
  2. Step 2: Convert to fraction form
    445,793.60/668,690.40 = 256,836.80/x
  3. Step 3: Cross multiply
    445,793.60x = 668,690.40 × 256,836.80
  4. Step 4: Simplify right side
    445,793.60x = 171,744,302,526.72
  5. Step 5: Solve for x
    x = 171,744,302,526.72/445,793.60
  6. Step 6: Final answer
    x = 385,255.20

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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.