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Finding the Fourth Proportional to 274.05, 378.07 and 186.57

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Solution

The fourth proportional to 274.05, 378.07 and 186.57 is: 257.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.05 : 378.07 = 186.57 : x
  2. Step 2: Convert to fraction form
    274.05/378.07 = 186.57/x
  3. Step 3: Cross multiply
    274.05x = 378.07 × 186.57
  4. Step 4: Simplify right side
    274.05x = 70,536.05
  5. Step 5: Solve for x
    x = 70,536.05/274.05
  6. Step 6: Final answer
    x = 257.38

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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.