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Finding the Fourth Proportional to 371.33, 556.79 and 198.19

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Solution

The fourth proportional to 371.33, 556.79 and 198.19 is: 297.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.33 : 556.79 = 198.19 : x
  2. Step 2: Convert to fraction form
    371.33/556.79 = 198.19/x
  3. Step 3: Cross multiply
    371.33x = 556.79 × 198.19
  4. Step 4: Simplify right side
    371.33x = 110,347.83
  5. Step 5: Solve for x
    x = 110,347.83/371.33
  6. Step 6: Final answer
    x = 297.17

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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.