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Finding the Third Proportional to 7.42 and 8.30

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Solution

The third proportional to 7.42 and 8.30 is: 9.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.42 : 8.30 = 8.30 : x
  2. Step 2: Convert to fraction form
    7.42/8.30 = 8.30/x
  3. Step 3: Cross multiply
    7.42x = 8.30 × 8.30
  4. Step 4: Simplify right side
    7.42x = 68.88
  5. Step 5: Solve for x
    x = 68.88/7.42
  6. Step 6: Final answer
    x = 9.28

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.