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Finding the Fourth Proportional to 274.21, 378.00 and 191.06

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Solution

The fourth proportional to 274.21, 378.00 and 191.06 is: 263.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.21 : 378.00 = 191.06 : x
  2. Step 2: Convert to fraction form
    274.21/378.00 = 191.06/x
  3. Step 3: Cross multiply
    274.21x = 378.00 × 191.06
  4. Step 4: Simplify right side
    274.21x = 72,219.51
  5. Step 5: Solve for x
    x = 72,219.51/274.21
  6. Step 6: Final answer
    x = 263.38

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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.