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Finding the Fourth Proportional to 325,811.90, 488,693.55 and 136,223.30

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Solution

The fourth proportional to 325,811.90, 488,693.55 and 136,223.30 is: 204,324.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,811.90 : 488,693.55 = 136,223.30 : x
  2. Step 2: Convert to fraction form
    325,811.90/488,693.55 = 136,223.30/x
  3. Step 3: Cross multiply
    325,811.90x = 488,693.55 × 136,223.30
  4. Step 4: Simplify right side
    325,811.90x = 66,571,448,069.72
  5. Step 5: Solve for x
    x = 66,571,448,069.72/325,811.90
  6. Step 6: Final answer
    x = 204,324.79

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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.