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Finding the Fourth Proportional to 4.34, 6.55 and 4.22

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Solution

The fourth proportional to 4.34, 6.55 and 4.22 is: 6.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.34 : 6.55 = 4.22 : x
  2. Step 2: Convert to fraction form
    4.34/6.55 = 4.22/x
  3. Step 3: Cross multiply
    4.34x = 6.55 × 4.22
  4. Step 4: Simplify right side
    4.34x = 27.64
  5. Step 5: Solve for x
    x = 27.64/4.34
  6. Step 6: Final answer
    x = 6.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.