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Finding the Fourth Proportional to 393,651.40, 590,534.70 and 127,366.60

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Solution

The fourth proportional to 393,651.40, 590,534.70 and 127,366.60 is: 191,068.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,651.40 : 590,534.70 = 127,366.60 : x
  2. Step 2: Convert to fraction form
    393,651.40/590,534.70 = 127,366.60/x
  3. Step 3: Cross multiply
    393,651.40x = 590,534.70 × 127,366.60
  4. Step 4: Simplify right side
    393,651.40x = 75,214,396,921.02
  5. Step 5: Solve for x
    x = 75,214,396,921.02/393,651.40
  6. Step 6: Final answer
    x = 191,068.54

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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.