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Finding the Fourth Proportional to 218.97, 326.90 and 194.67

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Solution

The fourth proportional to 218.97, 326.90 and 194.67 is: 290.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.97 : 326.90 = 194.67 : x
  2. Step 2: Convert to fraction form
    218.97/326.90 = 194.67/x
  3. Step 3: Cross multiply
    218.97x = 326.90 × 194.67
  4. Step 4: Simplify right side
    218.97x = 63,638.11
  5. Step 5: Solve for x
    x = 63,638.11/218.97
  6. Step 6: Final answer
    x = 290.62

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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.