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Finding the Fourth Proportional to 275.20, 377.20 and 271.42

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Solution

The fourth proportional to 275.20, 377.20 and 271.42 is: 372.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.20 : 377.20 = 271.42 : x
  2. Step 2: Convert to fraction form
    275.20/377.20 = 271.42/x
  3. Step 3: Cross multiply
    275.20x = 377.20 × 271.42
  4. Step 4: Simplify right side
    275.20x = 102,379.62
  5. Step 5: Solve for x
    x = 102,379.62/275.20
  6. Step 6: Final answer
    x = 372.02

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.