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Finding the Fourth Proportional to 4.36, 6.55 and 2.86

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Solution

The fourth proportional to 4.36, 6.55 and 2.86 is: 4.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.36 : 6.55 = 2.86 : x
  2. Step 2: Convert to fraction form
    4.36/6.55 = 2.86/x
  3. Step 3: Cross multiply
    4.36x = 6.55 × 2.86
  4. Step 4: Simplify right side
    4.36x = 18.73
  5. Step 5: Solve for x
    x = 18.73/4.36
  6. Step 6: Final answer
    x = 4.29

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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.