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Finding the Fourth Proportional to 233.84, 350.78 and 79.80

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Solution

The fourth proportional to 233.84, 350.78 and 79.80 is: 119.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.84 : 350.78 = 79.80 : x
  2. Step 2: Convert to fraction form
    233.84/350.78 = 79.80/x
  3. Step 3: Cross multiply
    233.84x = 350.78 × 79.80
  4. Step 4: Simplify right side
    233.84x = 27,991.85
  5. Step 5: Solve for x
    x = 27,991.85/233.84
  6. Step 6: Final answer
    x = 119.71

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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.