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Finding the Fourth Proportional to 233.25, 321.90 and 154.43

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Solution

The fourth proportional to 233.25, 321.90 and 154.43 is: 213.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.25 : 321.90 = 154.43 : x
  2. Step 2: Convert to fraction form
    233.25/321.90 = 154.43/x
  3. Step 3: Cross multiply
    233.25x = 321.90 × 154.43
  4. Step 4: Simplify right side
    233.25x = 49,710.42
  5. Step 5: Solve for x
    x = 49,710.42/233.25
  6. Step 6: Final answer
    x = 213.12

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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.