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Finding the Fourth Proportional to 386,103.97, 579,185.56 and 129,937.79

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Solution

The fourth proportional to 386,103.97, 579,185.56 and 129,937.79 is: 194,916.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,103.97 : 579,185.56 = 129,937.79 : x
  2. Step 2: Convert to fraction form
    386,103.97/579,185.56 = 129,937.79/x
  3. Step 3: Cross multiply
    386,103.97x = 579,185.56 × 129,937.79
  4. Step 4: Simplify right side
    386,103.97x = 75,258,089,287.88
  5. Step 5: Solve for x
    x = 75,258,089,287.88/386,103.97
  6. Step 6: Final answer
    x = 194,916.64

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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.