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Finding the Fourth Proportional to 5.22, 7.21 and 3.04

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Solution

The fourth proportional to 5.22, 7.21 and 3.04 is: 4.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.22 : 7.21 = 3.04 : x
  2. Step 2: Convert to fraction form
    5.22/7.21 = 3.04/x
  3. Step 3: Cross multiply
    5.22x = 7.21 × 3.04
  4. Step 4: Simplify right side
    5.22x = 21.87
  5. Step 5: Solve for x
    x = 21.87/5.22
  6. Step 6: Final answer
    x = 4.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.