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Finding the Fourth Proportional to 199.28, 274.35 and 189.54

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Solution

The fourth proportional to 199.28, 274.35 and 189.54 is: 260.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.28 : 274.35 = 189.54 : x
  2. Step 2: Convert to fraction form
    199.28/274.35 = 189.54/x
  3. Step 3: Cross multiply
    199.28x = 274.35 × 189.54
  4. Step 4: Simplify right side
    199.28x = 51,999.61
  5. Step 5: Solve for x
    x = 51,999.61/199.28
  6. Step 6: Final answer
    x = 260.94

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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.