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Finding the Fourth Proportional to 38.60, 53.28 and 22.22

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Solution

The fourth proportional to 38.60, 53.28 and 22.22 is: 30.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.60 : 53.28 = 22.22 : x
  2. Step 2: Convert to fraction form
    38.60/53.28 = 22.22/x
  3. Step 3: Cross multiply
    38.60x = 53.28 × 22.22
  4. Step 4: Simplify right side
    38.60x = 1,184.18
  5. Step 5: Solve for x
    x = 1,184.18/38.60
  6. Step 6: Final answer
    x = 30.68

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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.