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Finding the Fourth Proportional to 405,806.45, 560,192.26 and 242,520.56

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Solution

The fourth proportional to 405,806.45, 560,192.26 and 242,520.56 is: 334,785.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,806.45 : 560,192.26 = 242,520.56 : x
  2. Step 2: Convert to fraction form
    405,806.45/560,192.26 = 242,520.56/x
  3. Step 3: Cross multiply
    405,806.45x = 560,192.26 × 242,520.56
  4. Step 4: Simplify right side
    405,806.45x = 135,858,137,195.60
  5. Step 5: Solve for x
    x = 135,858,137,195.60/405,806.45
  6. Step 6: Final answer
    x = 334,785.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.