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Finding the Fourth Proportional to 233.20, 321.90 and 191.80

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Solution

The fourth proportional to 233.20, 321.90 and 191.80 is: 264.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.20 : 321.90 = 191.80 : x
  2. Step 2: Convert to fraction form
    233.20/321.90 = 191.80/x
  3. Step 3: Cross multiply
    233.20x = 321.90 × 191.80
  4. Step 4: Simplify right side
    233.20x = 61,740.42
  5. Step 5: Solve for x
    x = 61,740.42/233.20
  6. Step 6: Final answer
    x = 264.75

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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.