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Finding the Fourth Proportional to 274.35, 378.54 and 195.87

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Solution

The fourth proportional to 274.35, 378.54 and 195.87 is: 270.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.35 : 378.54 = 195.87 : x
  2. Step 2: Convert to fraction form
    274.35/378.54 = 195.87/x
  3. Step 3: Cross multiply
    274.35x = 378.54 × 195.87
  4. Step 4: Simplify right side
    274.35x = 74,144.63
  5. Step 5: Solve for x
    x = 74,144.63/274.35
  6. Step 6: Final answer
    x = 270.26

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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.