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Finding the Fourth Proportional to 275.45, 379.91 and 192.65

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Solution

The fourth proportional to 275.45, 379.91 and 192.65 is: 265.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.45 : 379.91 = 192.65 : x
  2. Step 2: Convert to fraction form
    275.45/379.91 = 192.65/x
  3. Step 3: Cross multiply
    275.45x = 379.91 × 192.65
  4. Step 4: Simplify right side
    275.45x = 73,188.24
  5. Step 5: Solve for x
    x = 73,188.24/275.45
  6. Step 6: Final answer
    x = 265.71

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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.