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Finding the Fourth Proportional to 197.83, 272.86 and 127.86

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Solution

The fourth proportional to 197.83, 272.86 and 127.86 is: 176.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.83 : 272.86 = 127.86 : x
  2. Step 2: Convert to fraction form
    197.83/272.86 = 127.86/x
  3. Step 3: Cross multiply
    197.83x = 272.86 × 127.86
  4. Step 4: Simplify right side
    197.83x = 34,887.88
  5. Step 5: Solve for x
    x = 34,887.88/197.83
  6. Step 6: Final answer
    x = 176.35

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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.