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Finding the Fourth Proportional to 789.88, 1,185.17 and 269.96

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Solution

The fourth proportional to 789.88, 1,185.17 and 269.96 is: 405.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.88 : 1,185.17 = 269.96 : x
  2. Step 2: Convert to fraction form
    789.88/1,185.17 = 269.96/x
  3. Step 3: Cross multiply
    789.88x = 1,185.17 × 269.96
  4. Step 4: Simplify right side
    789.88x = 319,944.84
  5. Step 5: Solve for x
    x = 319,944.84/789.88
  6. Step 6: Final answer
    x = 405.05

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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.