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Finding the Fourth Proportional to 197.07, 272.07 and 154.98

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Solution

The fourth proportional to 197.07, 272.07 and 154.98 is: 213.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.07 : 272.07 = 154.98 : x
  2. Step 2: Convert to fraction form
    197.07/272.07 = 154.98/x
  3. Step 3: Cross multiply
    197.07x = 272.07 × 154.98
  4. Step 4: Simplify right side
    197.07x = 42,165.41
  5. Step 5: Solve for x
    x = 42,165.41/197.07
  6. Step 6: Final answer
    x = 213.96

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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.