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Finding the Fourth Proportional to 5.31, 7.31 and 4.96

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Solution

The fourth proportional to 5.31, 7.31 and 4.96 is: 6.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.31 : 7.31 = 4.96 : x
  2. Step 2: Convert to fraction form
    5.31/7.31 = 4.96/x
  3. Step 3: Cross multiply
    5.31x = 7.31 × 4.96
  4. Step 4: Simplify right side
    5.31x = 36.21
  5. Step 5: Solve for x
    x = 36.21/5.31
  6. Step 6: Final answer
    x = 6.82

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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.