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Finding the Fourth Proportional to 393,906.42, 591,008.54 and 154,191.63

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Solution

The fourth proportional to 393,906.42, 591,008.54 and 154,191.63 is: 231,345.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,906.42 : 591,008.54 = 154,191.63 : x
  2. Step 2: Convert to fraction form
    393,906.42/591,008.54 = 154,191.63/x
  3. Step 3: Cross multiply
    393,906.42x = 591,008.54 × 154,191.63
  4. Step 4: Simplify right side
    393,906.42x = 91,128,569,355.56
  5. Step 5: Solve for x
    x = 91,128,569,355.56/393,906.42
  6. Step 6: Final answer
    x = 231,345.73

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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.