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Finding the Fourth Proportional to 339,354.07, 509,096.70 and 128,975.60

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Solution

The fourth proportional to 339,354.07, 509,096.70 and 128,975.60 is: 193,488.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,354.07 : 509,096.70 = 128,975.60 : x
  2. Step 2: Convert to fraction form
    339,354.07/509,096.70 = 128,975.60/x
  3. Step 3: Cross multiply
    339,354.07x = 509,096.70 × 128,975.60
  4. Step 4: Simplify right side
    339,354.07x = 65,661,052,340.52
  5. Step 5: Solve for x
    x = 65,661,052,340.52/339,354.07
  6. Step 6: Final answer
    x = 193,488.33

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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.