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Finding the Fourth Proportional to 6.70, 9.96 and 6.63

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Solution

The fourth proportional to 6.70, 9.96 and 6.63 is: 9.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.70 : 9.96 = 6.63 : x
  2. Step 2: Convert to fraction form
    6.70/9.96 = 6.63/x
  3. Step 3: Cross multiply
    6.70x = 9.96 × 6.63
  4. Step 4: Simplify right side
    6.70x = 66.03
  5. Step 5: Solve for x
    x = 66.03/6.70
  6. Step 6: Final answer
    x = 9.86

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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.