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Finding the Fourth Proportional to 445,791.60, 668,687.40 and 256,834.80

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Solution

The fourth proportional to 445,791.60, 668,687.40 and 256,834.80 is: 385,252.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,791.60 : 668,687.40 = 256,834.80 : x
  2. Step 2: Convert to fraction form
    445,791.60/668,687.40 = 256,834.80/x
  3. Step 3: Cross multiply
    445,791.60x = 668,687.40 × 256,834.80
  4. Step 4: Simplify right side
    445,791.60x = 171,742,194,641.52
  5. Step 5: Solve for x
    x = 171,742,194,641.52/445,791.60
  6. Step 6: Final answer
    x = 385,252.20

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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.