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Finding the Fourth Proportional to 197.35, 272.15 and 130.91

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Solution

The fourth proportional to 197.35, 272.15 and 130.91 is: 180.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.35 : 272.15 = 130.91 : x
  2. Step 2: Convert to fraction form
    197.35/272.15 = 130.91/x
  3. Step 3: Cross multiply
    197.35x = 272.15 × 130.91
  4. Step 4: Simplify right side
    197.35x = 35,625.14
  5. Step 5: Solve for x
    x = 35,625.14/197.35
  6. Step 6: Final answer
    x = 180.52

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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.