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Finding the Fourth Proportional to 383,912.52, 529,513.60 and 281,905.96

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Solution

The fourth proportional to 383,912.52, 529,513.60 and 281,905.96 is: 388,820.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,912.52 : 529,513.60 = 281,905.96 : x
  2. Step 2: Convert to fraction form
    383,912.52/529,513.60 = 281,905.96/x
  3. Step 3: Cross multiply
    383,912.52x = 529,513.60 × 281,905.96
  4. Step 4: Simplify right side
    383,912.52x = 149,273,039,741.06
  5. Step 5: Solve for x
    x = 149,273,039,741.06/383,912.52
  6. Step 6: Final answer
    x = 388,820.45

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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.