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Finding the Fourth Proportional to 405,697.80, 608,546.70 and 394,033.80

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Solution

The fourth proportional to 405,697.80, 608,546.70 and 394,033.80 is: 591,050.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,697.80 : 608,546.70 = 394,033.80 : x
  2. Step 2: Convert to fraction form
    405,697.80/608,546.70 = 394,033.80/x
  3. Step 3: Cross multiply
    405,697.80x = 608,546.70 × 394,033.80
  4. Step 4: Simplify right side
    405,697.80x = 239,787,968,678.46
  5. Step 5: Solve for x
    x = 239,787,968,678.46/405,697.80
  6. Step 6: Final answer
    x = 591,050.70

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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.