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Finding the Fourth Proportional to 353,144.60, 529,716.90 and 128,758.40

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Solution

The fourth proportional to 353,144.60, 529,716.90 and 128,758.40 is: 193,137.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,144.60 : 529,716.90 = 128,758.40 : x
  2. Step 2: Convert to fraction form
    353,144.60/529,716.90 = 128,758.40/x
  3. Step 3: Cross multiply
    353,144.60x = 529,716.90 × 128,758.40
  4. Step 4: Simplify right side
    353,144.60x = 68,205,500,496.96
  5. Step 5: Solve for x
    x = 68,205,500,496.96/353,144.60
  6. Step 6: Final answer
    x = 193,137.60

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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.