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Finding the Fourth Proportional to 199.35, 274.68 and 143.91

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Solution

The fourth proportional to 199.35, 274.68 and 143.91 is: 198.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.35 : 274.68 = 143.91 : x
  2. Step 2: Convert to fraction form
    199.35/274.68 = 143.91/x
  3. Step 3: Cross multiply
    199.35x = 274.68 × 143.91
  4. Step 4: Simplify right side
    199.35x = 39,529.20
  5. Step 5: Solve for x
    x = 39,529.20/199.35
  6. Step 6: Final answer
    x = 198.29

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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.