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Finding the Fourth Proportional to 331.47, 496.49 and 148.61

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Solution

The fourth proportional to 331.47, 496.49 and 148.61 is: 222.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.47 : 496.49 = 148.61 : x
  2. Step 2: Convert to fraction form
    331.47/496.49 = 148.61/x
  3. Step 3: Cross multiply
    331.47x = 496.49 × 148.61
  4. Step 4: Simplify right side
    331.47x = 73,783.38
  5. Step 5: Solve for x
    x = 73,783.38/331.47
  6. Step 6: Final answer
    x = 222.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.