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Finding the Fourth Proportional to 4.25, 6.39 and 3.18

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Solution

The fourth proportional to 4.25, 6.39 and 3.18 is: 4.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.25 : 6.39 = 3.18 : x
  2. Step 2: Convert to fraction form
    4.25/6.39 = 3.18/x
  3. Step 3: Cross multiply
    4.25x = 6.39 × 3.18
  4. Step 4: Simplify right side
    4.25x = 20.34
  5. Step 5: Solve for x
    x = 20.34/4.25
  6. Step 6: Final answer
    x = 4.78

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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.