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Finding the Fourth Proportional to 3.31, 4.58 and 2.89

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Solution

The fourth proportional to 3.31, 4.58 and 2.89 is: 3.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.31 : 4.58 = 2.89 : x
  2. Step 2: Convert to fraction form
    3.31/4.58 = 2.89/x
  3. Step 3: Cross multiply
    3.31x = 4.58 × 2.89
  4. Step 4: Simplify right side
    3.31x = 13.21
  5. Step 5: Solve for x
    x = 13.21/3.31
  6. Step 6: Final answer
    x = 3.99

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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.