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Finding the Fourth Proportional to 274.78, 379.43 and 192.05

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Solution

The fourth proportional to 274.78, 379.43 and 192.05 is: 265.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.78 : 379.43 = 192.05 : x
  2. Step 2: Convert to fraction form
    274.78/379.43 = 192.05/x
  3. Step 3: Cross multiply
    274.78x = 379.43 × 192.05
  4. Step 4: Simplify right side
    274.78x = 72,870.96
  5. Step 5: Solve for x
    x = 72,870.96/274.78
  6. Step 6: Final answer
    x = 265.20

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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.