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Finding the Fourth Proportional to 50.21, 69.29 and 28.08

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Solution

The fourth proportional to 50.21, 69.29 and 28.08 is: 38.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.21 : 69.29 = 28.08 : x
  2. Step 2: Convert to fraction form
    50.21/69.29 = 28.08/x
  3. Step 3: Cross multiply
    50.21x = 69.29 × 28.08
  4. Step 4: Simplify right side
    50.21x = 1,945.18
  5. Step 5: Solve for x
    x = 1,945.18/50.21
  6. Step 6: Final answer
    x = 38.74

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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.