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Finding the Fourth Proportional to 4.82, 7.20 and 3.30

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Solution

The fourth proportional to 4.82, 7.20 and 3.30 is: 4.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.82 : 7.20 = 3.30 : x
  2. Step 2: Convert to fraction form
    4.82/7.20 = 3.30/x
  3. Step 3: Cross multiply
    4.82x = 7.20 × 3.30
  4. Step 4: Simplify right side
    4.82x = 23.74
  5. Step 5: Solve for x
    x = 23.74/4.82
  6. Step 6: Final answer
    x = 4.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.