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Finding the Fourth Proportional to 393,691.60, 590,630.88 and 127,452.16

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Solution

The fourth proportional to 393,691.60, 590,630.88 and 127,452.16 is: 191,208.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,691.60 : 590,630.88 = 127,452.16 : x
  2. Step 2: Convert to fraction form
    393,691.60/590,630.88 = 127,452.16/x
  3. Step 3: Cross multiply
    393,691.60x = 590,630.88 × 127,452.16
  4. Step 4: Simplify right side
    393,691.60x = 75,277,181,418.70
  5. Step 5: Solve for x
    x = 75,277,181,418.70/393,691.60
  6. Step 6: Final answer
    x = 191,208.50

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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.