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Finding the Fourth Proportional to 248.32, 342.97 and 198.70

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Solution

The fourth proportional to 248.32, 342.97 and 198.70 is: 274.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.32 : 342.97 = 198.70 : x
  2. Step 2: Convert to fraction form
    248.32/342.97 = 198.70/x
  3. Step 3: Cross multiply
    248.32x = 342.97 × 198.70
  4. Step 4: Simplify right side
    248.32x = 68,147.16
  5. Step 5: Solve for x
    x = 68,147.16/248.32
  6. Step 6: Final answer
    x = 274.44

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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.