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Finding the Fourth Proportional to 279, 418.67 and 192.26

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Solution

The fourth proportional to 279, 418.67 and 192.26 is: 288.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    279 : 418.67 = 192.26 : x
  2. Step 2: Convert to fraction form
    279/418.67 = 192.26/x
  3. Step 3: Cross multiply
    279x = 418.67 × 192.26
  4. Step 4: Simplify right side
    279x = 80,490.44
  5. Step 5: Solve for x
    x = 80,490.44/279
  6. Step 6: Final answer
    x = 288.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.