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Finding the Fourth Proportional to 528,091.20, 792,039.60 and 328,053.60

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Solution

The fourth proportional to 528,091.20, 792,039.60 and 328,053.60 is: 492,020.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,091.20 : 792,039.60 = 328,053.60 : x
  2. Step 2: Convert to fraction form
    528,091.20/792,039.60 = 328,053.60/x
  3. Step 3: Cross multiply
    528,091.20x = 792,039.60 × 328,053.60
  4. Step 4: Simplify right side
    528,091.20x = 259,831,442,122.56
  5. Step 5: Solve for x
    x = 259,831,442,122.56/528,091.20
  6. Step 6: Final answer
    x = 492,020.02

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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.