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Finding the Fourth Proportional to 36.45, 50.18 and 28.67

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Solution

The fourth proportional to 36.45, 50.18 and 28.67 is: 39.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.45 : 50.18 = 28.67 : x
  2. Step 2: Convert to fraction form
    36.45/50.18 = 28.67/x
  3. Step 3: Cross multiply
    36.45x = 50.18 × 28.67
  4. Step 4: Simplify right side
    36.45x = 1,438.48
  5. Step 5: Solve for x
    x = 1,438.48/36.45
  6. Step 6: Final answer
    x = 39.46

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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.