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Finding the Fourth Proportional to 248.82, 343.42 and 143.93

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Solution

The fourth proportional to 248.82, 343.42 and 143.93 is: 198.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.82 : 343.42 = 143.93 : x
  2. Step 2: Convert to fraction form
    248.82/343.42 = 143.93/x
  3. Step 3: Cross multiply
    248.82x = 343.42 × 143.93
  4. Step 4: Simplify right side
    248.82x = 49,426.72
  5. Step 5: Solve for x
    x = 49,426.72/248.82
  6. Step 6: Final answer
    x = 198.64

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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.