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Finding the Fourth Proportional to 197.94, 272.88 and 135.84

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Solution

The fourth proportional to 197.94, 272.88 and 135.84 is: 187.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.94 : 272.88 = 135.84 : x
  2. Step 2: Convert to fraction form
    197.94/272.88 = 135.84/x
  3. Step 3: Cross multiply
    197.94x = 272.88 × 135.84
  4. Step 4: Simplify right side
    197.94x = 37,068.02
  5. Step 5: Solve for x
    x = 37,068.02/197.94
  6. Step 6: Final answer
    x = 187.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.