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Finding the Fourth Proportional to 2.75, 4.12 and 1.75

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Solution

The fourth proportional to 2.75, 4.12 and 1.75 is: 2.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.75 : 4.12 = 1.75 : x
  2. Step 2: Convert to fraction form
    2.75/4.12 = 1.75/x
  3. Step 3: Cross multiply
    2.75x = 4.12 × 1.75
  4. Step 4: Simplify right side
    2.75x = 7.21
  5. Step 5: Solve for x
    x = 7.21/2.75
  6. Step 6: Final answer
    x = 2.62

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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.