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Finding the Fourth Proportional to 353,919.20, 531,915.60 and 347,698.40

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Solution

The fourth proportional to 353,919.20, 531,915.60 and 347,698.40 is: 522,566.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,919.20 : 531,915.60 = 347,698.40 : x
  2. Step 2: Convert to fraction form
    353,919.20/531,915.60 = 347,698.40/x
  3. Step 3: Cross multiply
    353,919.20x = 531,915.60 × 347,698.40
  4. Step 4: Simplify right side
    353,919.20x = 184,946,203,055.04
  5. Step 5: Solve for x
    x = 184,946,203,055.04/353,919.20
  6. Step 6: Final answer
    x = 522,566.18

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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.