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Finding the Fourth Proportional to 2.88, 4 and 2.76

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Solution

The fourth proportional to 2.88, 4 and 2.76 is: 3.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.88 : 4 = 2.76 : x
  2. Step 2: Convert to fraction form
    2.88/4 = 2.76/x
  3. Step 3: Cross multiply
    2.88x = 4 × 2.76
  4. Step 4: Simplify right side
    2.88x = 11.04
  5. Step 5: Solve for x
    x = 11.04/2.88
  6. Step 6: Final answer
    x = 3.83

Related Problems

Find fourth proportional to 1.44, 2 and 1.38
Half scale
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Double scale
Find fourth proportional to 3.88, 5.39 and 3.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.