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Finding the Third Proportional to 5.28 and 8.45

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Solution

The third proportional to 5.28 and 8.45 is: 13.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.28 : 8.45 = 8.45 : x
  2. Step 2: Convert to fraction form
    5.28/8.45 = 8.45/x
  3. Step 3: Cross multiply
    5.28x = 8.45 × 8.45
  4. Step 4: Simplify right side
    5.28x = 71.33
  5. Step 5: Solve for x
    x = 71.33/5.28
  6. Step 6: Final answer
    x = 13.51

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.