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Finding the Fourth Proportional to 393,440.40, 590,306.40 and 127,209.60

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Solution

The fourth proportional to 393,440.40, 590,306.40 and 127,209.60 is: 190,861.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,440.40 : 590,306.40 = 127,209.60 : x
  2. Step 2: Convert to fraction form
    393,440.40/590,306.40 = 127,209.60/x
  3. Step 3: Cross multiply
    393,440.40x = 590,306.40 × 127,209.60
  4. Step 4: Simplify right side
    393,440.40x = 75,092,641,021.44
  5. Step 5: Solve for x
    x = 75,092,641,021.44/393,440.40
  6. Step 6: Final answer
    x = 190,861.54

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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.