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Finding the Fourth Proportional to 393,982.55, 543,777.19 and 256,333.48

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Solution

The fourth proportional to 393,982.55, 543,777.19 and 256,333.48 is: 353,793.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,982.55 : 543,777.19 = 256,333.48 : x
  2. Step 2: Convert to fraction form
    393,982.55/543,777.19 = 256,333.48/x
  3. Step 3: Cross multiply
    393,982.55x = 543,777.19 × 256,333.48
  4. Step 4: Simplify right side
    393,982.55x = 139,388,297,457.05
  5. Step 5: Solve for x
    x = 139,388,297,457.05/393,982.55
  6. Step 6: Final answer
    x = 353,793.08

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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.