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Finding the Fourth Proportional to 3.28, 4.53 and 2.85

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Solution

The fourth proportional to 3.28, 4.53 and 2.85 is: 3.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.28 : 4.53 = 2.85 : x
  2. Step 2: Convert to fraction form
    3.28/4.53 = 2.85/x
  3. Step 3: Cross multiply
    3.28x = 4.53 × 2.85
  4. Step 4: Simplify right side
    3.28x = 12.91
  5. Step 5: Solve for x
    x = 12.91/3.28
  6. Step 6: Final answer
    x = 3.94

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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.