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Finding the Fourth Proportional to 3.54, 5.31 and 1.53

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Solution

The fourth proportional to 3.54, 5.31 and 1.53 is: 2.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.54 : 5.31 = 1.53 : x
  2. Step 2: Convert to fraction form
    3.54/5.31 = 1.53/x
  3. Step 3: Cross multiply
    3.54x = 5.31 × 1.53
  4. Step 4: Simplify right side
    3.54x = 8.14
  5. Step 5: Solve for x
    x = 8.14/3.54
  6. Step 6: Final answer
    x = 2.30

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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.