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Finding the Fourth Proportional to 240.53, 331.79 and 153.05

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Solution

The fourth proportional to 240.53, 331.79 and 153.05 is: 211.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.53 : 331.79 = 153.05 : x
  2. Step 2: Convert to fraction form
    240.53/331.79 = 153.05/x
  3. Step 3: Cross multiply
    240.53x = 331.79 × 153.05
  4. Step 4: Simplify right side
    240.53x = 50,780.46
  5. Step 5: Solve for x
    x = 50,780.46/240.53
  6. Step 6: Final answer
    x = 211.12

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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.