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Finding the Fourth Proportional to 218.07, 328.41 and 196.68

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Solution

The fourth proportional to 218.07, 328.41 and 196.68 is: 296.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.07 : 328.41 = 196.68 : x
  2. Step 2: Convert to fraction form
    218.07/328.41 = 196.68/x
  3. Step 3: Cross multiply
    218.07x = 328.41 × 196.68
  4. Step 4: Simplify right side
    218.07x = 64,591.68
  5. Step 5: Solve for x
    x = 64,591.68/218.07
  6. Step 6: Final answer
    x = 296.20

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.