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Finding the Fourth Proportional to 789,915.96, 1,183,800 and 334,128.12

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Solution

The fourth proportional to 789,915.96, 1,183,800 and 334,128.12 is: 500,737.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,915.96 : 1,183,800 = 334,128.12 : x
  2. Step 2: Convert to fraction form
    789,915.96/1,183,800 = 334,128.12/x
  3. Step 3: Cross multiply
    789,915.96x = 1,183,800 × 334,128.12
  4. Step 4: Simplify right side
    789,915.96x = 395,540,868,456
  5. Step 5: Solve for x
    x = 395,540,868,456/789,915.96
  6. Step 6: Final answer
    x = 500,737.91

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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.