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Finding the Fourth Proportional to 393,190.35, 542,242.62 and 291,469.20

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Solution

The fourth proportional to 393,190.35, 542,242.62 and 291,469.20 is: 401,960.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,190.35 : 542,242.62 = 291,469.20 : x
  2. Step 2: Convert to fraction form
    393,190.35/542,242.62 = 291,469.20/x
  3. Step 3: Cross multiply
    393,190.35x = 542,242.62 × 291,469.20
  4. Step 4: Simplify right side
    393,190.35x = 158,047,022,657.30
  5. Step 5: Solve for x
    x = 158,047,022,657.30/393,190.35
  6. Step 6: Final answer
    x = 401,960.58

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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.