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Finding the Fourth Proportional to 5.31, 7.23 and 5.25

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Solution

The fourth proportional to 5.31, 7.23 and 5.25 is: 7.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.31 : 7.23 = 5.25 : x
  2. Step 2: Convert to fraction form
    5.31/7.23 = 5.25/x
  3. Step 3: Cross multiply
    5.31x = 7.23 × 5.25
  4. Step 4: Simplify right side
    5.31x = 37.96
  5. Step 5: Solve for x
    x = 37.96/5.31
  6. Step 6: Final answer
    x = 7.15

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.