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Finding the Fourth Proportional to 199.30, 274.95 and 143.92

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Solution

The fourth proportional to 199.30, 274.95 and 143.92 is: 198.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.30 : 274.95 = 143.92 : x
  2. Step 2: Convert to fraction form
    199.30/274.95 = 143.92/x
  3. Step 3: Cross multiply
    199.30x = 274.95 × 143.92
  4. Step 4: Simplify right side
    199.30x = 39,569.43
  5. Step 5: Solve for x
    x = 39,569.43/199.30
  6. Step 6: Final answer
    x = 198.54

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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.