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Finding the Fourth Proportional to 218.25, 299.54 and 197.49

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Solution

The fourth proportional to 218.25, 299.54 and 197.49 is: 271.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.25 : 299.54 = 197.49 : x
  2. Step 2: Convert to fraction form
    218.25/299.54 = 197.49/x
  3. Step 3: Cross multiply
    218.25x = 299.54 × 197.49
  4. Step 4: Simplify right side
    218.25x = 59,155.17
  5. Step 5: Solve for x
    x = 59,155.17/218.25
  6. Step 6: Final answer
    x = 271.04

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.