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Finding the Fourth Proportional to 3.73, 5.15 and 3.02

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Solution

The fourth proportional to 3.73, 5.15 and 3.02 is: 4.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.73 : 5.15 = 3.02 : x
  2. Step 2: Convert to fraction form
    3.73/5.15 = 3.02/x
  3. Step 3: Cross multiply
    3.73x = 5.15 × 3.02
  4. Step 4: Simplify right side
    3.73x = 15.55
  5. Step 5: Solve for x
    x = 15.55/3.73
  6. Step 6: Final answer
    x = 4.17

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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.