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Finding the Fourth Proportional to 371.44, 556.75 and 328.21

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Solution

The fourth proportional to 371.44, 556.75 and 328.21 is: 491.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.44 : 556.75 = 328.21 : x
  2. Step 2: Convert to fraction form
    371.44/556.75 = 328.21/x
  3. Step 3: Cross multiply
    371.44x = 556.75 × 328.21
  4. Step 4: Simplify right side
    371.44x = 182,729.28
  5. Step 5: Solve for x
    x = 182,729.28/371.44
  6. Step 6: Final answer
    x = 491.95

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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.