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Finding the Fourth Proportional to 392,979, 541,067.58 and 357,061.56

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Solution

The fourth proportional to 392,979, 541,067.58 and 357,061.56 is: 491,615.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,979 : 541,067.58 = 357,061.56 : x
  2. Step 2: Convert to fraction form
    392,979/541,067.58 = 357,061.56/x
  3. Step 3: Cross multiply
    392,979x = 541,067.58 × 357,061.56
  4. Step 4: Simplify right side
    392,979x = 193,194,434,180.23
  5. Step 5: Solve for x
    x = 193,194,434,180.23/392,979
  6. Step 6: Final answer
    x = 491,615.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.