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Finding the Fourth Proportional to 331.25, 496.55 and 148.59

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Solution

The fourth proportional to 331.25, 496.55 and 148.59 is: 222.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.25 : 496.55 = 148.59 : x
  2. Step 2: Convert to fraction form
    331.25/496.55 = 148.59/x
  3. Step 3: Cross multiply
    331.25x = 496.55 × 148.59
  4. Step 4: Simplify right side
    331.25x = 73,781.62
  5. Step 5: Solve for x
    x = 73,781.62/331.25
  6. Step 6: Final answer
    x = 222.74

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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.