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Finding the Fourth Proportional to 371.25, 512.46 and 255.15

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Solution

The fourth proportional to 371.25, 512.46 and 255.15 is: 352.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.25 : 512.46 = 255.15 : x
  2. Step 2: Convert to fraction form
    371.25/512.46 = 255.15/x
  3. Step 3: Cross multiply
    371.25x = 512.46 × 255.15
  4. Step 4: Simplify right side
    371.25x = 130,754.17
  5. Step 5: Solve for x
    x = 130,754.17/371.25
  6. Step 6: Final answer
    x = 352.20

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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.