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Finding the Fourth Proportional to 353,122.60, 529,683.90 and 128,736.40

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Solution

The fourth proportional to 353,122.60, 529,683.90 and 128,736.40 is: 193,104.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,122.60 : 529,683.90 = 128,736.40 : x
  2. Step 2: Convert to fraction form
    353,122.60/529,683.90 = 128,736.40/x
  3. Step 3: Cross multiply
    353,122.60x = 529,683.90 × 128,736.40
  4. Step 4: Simplify right side
    353,122.60x = 68,189,598,423.96
  5. Step 5: Solve for x
    x = 68,189,598,423.96/353,122.60
  6. Step 6: Final answer
    x = 193,104.60

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1.5x scale

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.