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Finding the Fourth Proportional to 4.26, 6.39 and 1.72

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Solution

The fourth proportional to 4.26, 6.39 and 1.72 is: 2.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.26 : 6.39 = 1.72 : x
  2. Step 2: Convert to fraction form
    4.26/6.39 = 1.72/x
  3. Step 3: Cross multiply
    4.26x = 6.39 × 1.72
  4. Step 4: Simplify right side
    4.26x = 11.02
  5. Step 5: Solve for x
    x = 11.02/4.26
  6. Step 6: Final answer
    x = 2.59

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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.