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Finding the Fourth Proportional to 371.72, 512.48 and 240.48

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Solution

The fourth proportional to 371.72, 512.48 and 240.48 is: 331.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.72 : 512.48 = 240.48 : x
  2. Step 2: Convert to fraction form
    371.72/512.48 = 240.48/x
  3. Step 3: Cross multiply
    371.72x = 512.48 × 240.48
  4. Step 4: Simplify right side
    371.72x = 123,241.19
  5. Step 5: Solve for x
    x = 123,241.19/371.72
  6. Step 6: Final answer
    x = 331.54

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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.