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Finding the Fourth Proportional to 3.49, 5.15 and 3.48

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Solution

The fourth proportional to 3.49, 5.15 and 3.48 is: 5.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.49 : 5.15 = 3.48 : x
  2. Step 2: Convert to fraction form
    3.49/5.15 = 3.48/x
  3. Step 3: Cross multiply
    3.49x = 5.15 × 3.48
  4. Step 4: Simplify right side
    3.49x = 17.92
  5. Step 5: Solve for x
    x = 17.92/3.49
  6. Step 6: Final answer
    x = 5.14

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.