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Finding the Fourth Proportional to 371.45, 512.31 and 240.23

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Solution

The fourth proportional to 371.45, 512.31 and 240.23 is: 331.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.45 : 512.31 = 240.23 : x
  2. Step 2: Convert to fraction form
    371.45/512.31 = 240.23/x
  3. Step 3: Cross multiply
    371.45x = 512.31 × 240.23
  4. Step 4: Simplify right side
    371.45x = 123,069.67
  5. Step 5: Solve for x
    x = 123,069.67/371.45
  6. Step 6: Final answer
    x = 331.33

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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.