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Finding the Fourth Proportional to 371.32, 512.28 and 254.98

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Solution

The fourth proportional to 371.32, 512.28 and 254.98 is: 351.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.32 : 512.28 = 254.98 : x
  2. Step 2: Convert to fraction form
    371.32/512.28 = 254.98/x
  3. Step 3: Cross multiply
    371.32x = 512.28 × 254.98
  4. Step 4: Simplify right side
    371.32x = 130,621.15
  5. Step 5: Solve for x
    x = 130,621.15/371.32
  6. Step 6: Final answer
    x = 351.78

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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.