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Finding the Fourth Proportional to 36.08, 53.81 and 30.70

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Solution

The fourth proportional to 36.08, 53.81 and 30.70 is: 45.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.08 : 53.81 = 30.70 : x
  2. Step 2: Convert to fraction form
    36.08/53.81 = 30.70/x
  3. Step 3: Cross multiply
    36.08x = 53.81 × 30.70
  4. Step 4: Simplify right side
    36.08x = 1,651.54
  5. Step 5: Solve for x
    x = 1,651.54/36.08
  6. Step 6: Final answer
    x = 45.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.