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Finding the Third Proportional to 5.28 and 5.91

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Solution

The third proportional to 5.28 and 5.91 is: 6.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.28 : 5.91 = 5.91 : x
  2. Step 2: Convert to fraction form
    5.28/5.91 = 5.91/x
  3. Step 3: Cross multiply
    5.28x = 5.91 × 5.91
  4. Step 4: Simplify right side
    5.28x = 34.91
  5. Step 5: Solve for x
    x = 34.91/5.28
  6. Step 6: Final answer
    x = 6.61

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.