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Finding the Fourth Proportional to 274.64, 378.63 and 196.01

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Solution

The fourth proportional to 274.64, 378.63 and 196.01 is: 270.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.64 : 378.63 = 196.01 : x
  2. Step 2: Convert to fraction form
    274.64/378.63 = 196.01/x
  3. Step 3: Cross multiply
    274.64x = 378.63 × 196.01
  4. Step 4: Simplify right side
    274.64x = 74,215.27
  5. Step 5: Solve for x
    x = 74,215.27/274.64
  6. Step 6: Final answer
    x = 270.23

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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.