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Finding the Fourth Proportional to 2.77, 3.81 and 2.69

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Solution

The fourth proportional to 2.77, 3.81 and 2.69 is: 3.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.77 : 3.81 = 2.69 : x
  2. Step 2: Convert to fraction form
    2.77/3.81 = 2.69/x
  3. Step 3: Cross multiply
    2.77x = 3.81 × 2.69
  4. Step 4: Simplify right side
    2.77x = 10.23
  5. Step 5: Solve for x
    x = 10.23/2.77
  6. Step 6: Final answer
    x = 3.70

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Find fourth proportional to 1.38, 1.91 and 1.34
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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.