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Finding the Fourth Proportional to 371.73, 554.80 and 328.39

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Solution

The fourth proportional to 371.73, 554.80 and 328.39 is: 490.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.73 : 554.80 = 328.39 : x
  2. Step 2: Convert to fraction form
    371.73/554.80 = 328.39/x
  3. Step 3: Cross multiply
    371.73x = 554.80 × 328.39
  4. Step 4: Simplify right side
    371.73x = 182,190.77
  5. Step 5: Solve for x
    x = 182,190.77/371.73
  6. Step 6: Final answer
    x = 490.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.