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Finding the Third Proportional to 4.92 and 7.45

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Solution

The third proportional to 4.92 and 7.45 is: 11.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.92 : 7.45 = 7.45 : x
  2. Step 2: Convert to fraction form
    4.92/7.45 = 7.45/x
  3. Step 3: Cross multiply
    4.92x = 7.45 × 7.45
  4. Step 4: Simplify right side
    4.92x = 55.55
  5. Step 5: Solve for x
    x = 55.55/4.92
  6. Step 6: Final answer
    x = 11.29

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.