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Finding the Fourth Proportional to 393,192.60, 542,245.73 and 291,471.45

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Solution

The fourth proportional to 393,192.60, 542,245.73 and 291,471.45 is: 401,963.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,192.60 : 542,245.73 = 291,471.45 : x
  2. Step 2: Convert to fraction form
    393,192.60/542,245.73 = 291,471.45/x
  3. Step 3: Cross multiply
    393,192.60x = 542,245.73 × 291,471.45
  4. Step 4: Simplify right side
    393,192.60x = 158,049,147,722.05
  5. Step 5: Solve for x
    x = 158,049,147,722.05/393,192.60
  6. Step 6: Final answer
    x = 401,963.69

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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.