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Finding the Fourth Proportional to 38.16, 57.15 and 36.36

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Solution

The fourth proportional to 38.16, 57.15 and 36.36 is: 54.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.16 : 57.15 = 36.36 : x
  2. Step 2: Convert to fraction form
    38.16/57.15 = 36.36/x
  3. Step 3: Cross multiply
    38.16x = 57.15 × 36.36
  4. Step 4: Simplify right side
    38.16x = 2,077.97
  5. Step 5: Solve for x
    x = 2,077.97/38.16
  6. Step 6: Final answer
    x = 54.45

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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.