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Finding the Fourth Proportional to 240.33, 331.68 and 153

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Solution

The fourth proportional to 240.33, 331.68 and 153 is: 211.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.33 : 331.68 = 153 : x
  2. Step 2: Convert to fraction form
    240.33/331.68 = 153/x
  3. Step 3: Cross multiply
    240.33x = 331.68 × 153
  4. Step 4: Simplify right side
    240.33x = 50,747.61
  5. Step 5: Solve for x
    x = 50,747.61/240.33
  6. Step 6: Final answer
    x = 211.15

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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.