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Finding the Fourth Proportional to 44.22, 66.31 and 12.15

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Solution

The fourth proportional to 44.22, 66.31 and 12.15 is: 18.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.22 : 66.31 = 12.15 : x
  2. Step 2: Convert to fraction form
    44.22/66.31 = 12.15/x
  3. Step 3: Cross multiply
    44.22x = 66.31 × 12.15
  4. Step 4: Simplify right side
    44.22x = 805.67
  5. Step 5: Solve for x
    x = 805.67/44.22
  6. Step 6: Final answer
    x = 18.22

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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.