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Finding the Fourth Proportional to 289,603.96, 399,416.52 and 203,846.83

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Solution

The fourth proportional to 289,603.96, 399,416.52 and 203,846.83 is: 281,141.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,603.96 : 399,416.52 = 203,846.83 : x
  2. Step 2: Convert to fraction form
    289,603.96/399,416.52 = 203,846.83/x
  3. Step 3: Cross multiply
    289,603.96x = 399,416.52 × 203,846.83
  4. Step 4: Simplify right side
    289,603.96x = 81,419,791,451.63
  5. Step 5: Solve for x
    x = 81,419,791,451.63/289,603.96
  6. Step 6: Final answer
    x = 281,141.84

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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.