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Finding the Third Proportional to 4.69 and 7.28

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Solution

The third proportional to 4.69 and 7.28 is: 11.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.69 : 7.28 = 7.28 : x
  2. Step 2: Convert to fraction form
    4.69/7.28 = 7.28/x
  3. Step 3: Cross multiply
    4.69x = 7.28 × 7.28
  4. Step 4: Simplify right side
    4.69x = 53.02
  5. Step 5: Solve for x
    x = 53.02/4.69
  6. Step 6: Final answer
    x = 11.31

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.