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Finding the Fourth Proportional to 789.05, 1,183.50 and 268.98

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Solution

The fourth proportional to 789.05, 1,183.50 and 268.98 is: 403.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.05 : 1,183.50 = 268.98 : x
  2. Step 2: Convert to fraction form
    789.05/1,183.50 = 268.98/x
  3. Step 3: Cross multiply
    789.05x = 1,183.50 × 268.98
  4. Step 4: Simplify right side
    789.05x = 318,337.83
  5. Step 5: Solve for x
    x = 318,337.83/789.05
  6. Step 6: Final answer
    x = 403.45

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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.