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Finding the Fourth Proportional to 5.33, 7.31 and 4.89

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Solution

The fourth proportional to 5.33, 7.31 and 4.89 is: 6.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.33 : 7.31 = 4.89 : x
  2. Step 2: Convert to fraction form
    5.33/7.31 = 4.89/x
  3. Step 3: Cross multiply
    5.33x = 7.31 × 4.89
  4. Step 4: Simplify right side
    5.33x = 35.75
  5. Step 5: Solve for x
    x = 35.75/5.33
  6. Step 6: Final answer
    x = 6.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.