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Finding the Fourth Proportional to 196.64, 272.62 and 185.70

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Solution

The fourth proportional to 196.64, 272.62 and 185.70 is: 257.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.64 : 272.62 = 185.70 : x
  2. Step 2: Convert to fraction form
    196.64/272.62 = 185.70/x
  3. Step 3: Cross multiply
    196.64x = 272.62 × 185.70
  4. Step 4: Simplify right side
    196.64x = 50,625.07
  5. Step 5: Solve for x
    x = 50,625.07/196.64
  6. Step 6: Final answer
    x = 257.46

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.