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Finding the Fourth Proportional to 5.51, 8.26 and 4.15

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Solution

The fourth proportional to 5.51, 8.26 and 4.15 is: 6.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.51 : 8.26 = 4.15 : x
  2. Step 2: Convert to fraction form
    5.51/8.26 = 4.15/x
  3. Step 3: Cross multiply
    5.51x = 8.26 × 4.15
  4. Step 4: Simplify right side
    5.51x = 34.26
  5. Step 5: Solve for x
    x = 34.26/5.51
  6. Step 6: Final answer
    x = 6.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.