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Finding the Fourth Proportional to 240.54, 331.79 and 153.26

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Solution

The fourth proportional to 240.54, 331.79 and 153.26 is: 211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.54 : 331.79 = 153.26 : x
  2. Step 2: Convert to fraction form
    240.54/331.79 = 153.26/x
  3. Step 3: Cross multiply
    240.54x = 331.79 × 153.26
  4. Step 4: Simplify right side
    240.54x = 50,850.14
  5. Step 5: Solve for x
    x = 50,850.14/240.54
  6. Step 6: Final answer
    x = 211.40

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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.