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Finding the Third Proportional to 2.80 and 4.35

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Solution

The third proportional to 2.80 and 4.35 is: 6.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.80 : 4.35 = 4.35 : x
  2. Step 2: Convert to fraction form
    2.80/4.35 = 4.35/x
  3. Step 3: Cross multiply
    2.80x = 4.35 × 4.35
  4. Step 4: Simplify right side
    2.80x = 18.97
  5. Step 5: Solve for x
    x = 18.97/2.80
  6. Step 6: Final answer
    x = 6.77

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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.