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Finding the Fourth Proportional to 393,832.33, 543,416.93 and 221,723.53

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Solution

The fourth proportional to 393,832.33, 543,416.93 and 221,723.53 is: 305,938.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,832.33 : 543,416.93 = 221,723.53 : x
  2. Step 2: Convert to fraction form
    393,832.33/543,416.93 = 221,723.53/x
  3. Step 3: Cross multiply
    393,832.33x = 543,416.93 × 221,723.53
  4. Step 4: Simplify right side
    393,832.33x = 120,488,318,872.75
  5. Step 5: Solve for x
    x = 120,488,318,872.75/393,832.33
  6. Step 6: Final answer
    x = 305,938.11

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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.