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Finding the Fourth Proportional to 44.12, 60.81 and 30.80

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Solution

The fourth proportional to 44.12, 60.81 and 30.80 is: 42.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.12 : 60.81 = 30.80 : x
  2. Step 2: Convert to fraction form
    44.12/60.81 = 30.80/x
  3. Step 3: Cross multiply
    44.12x = 60.81 × 30.80
  4. Step 4: Simplify right side
    44.12x = 1,872.64
  5. Step 5: Solve for x
    x = 1,872.64/44.12
  6. Step 6: Final answer
    x = 42.45

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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.