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Finding the Third Proportional to 8.80 and 19.28

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Solution

The third proportional to 8.80 and 19.28 is: 42.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.80 : 19.28 = 19.28 : x
  2. Step 2: Convert to fraction form
    8.80/19.28 = 19.28/x
  3. Step 3: Cross multiply
    8.80x = 19.28 × 19.28
  4. Step 4: Simplify right side
    8.80x = 371.63
  5. Step 5: Solve for x
    x = 371.63/8.80
  6. Step 6: Final answer
    x = 42.21

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.