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Finding the Fourth Proportional to 199.22, 275.55 and 186.12

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Solution

The fourth proportional to 199.22, 275.55 and 186.12 is: 257.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.22 : 275.55 = 186.12 : x
  2. Step 2: Convert to fraction form
    199.22/275.55 = 186.12/x
  3. Step 3: Cross multiply
    199.22x = 275.55 × 186.12
  4. Step 4: Simplify right side
    199.22x = 51,285.37
  5. Step 5: Solve for x
    x = 51,285.37/199.22
  6. Step 6: Final answer
    x = 257.44

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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.