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Finding the Fourth Proportional to 50.38, 69.54 and 38.72

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Solution

The fourth proportional to 50.38, 69.54 and 38.72 is: 53.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.38 : 69.54 = 38.72 : x
  2. Step 2: Convert to fraction form
    50.38/69.54 = 38.72/x
  3. Step 3: Cross multiply
    50.38x = 69.54 × 38.72
  4. Step 4: Simplify right side
    50.38x = 2,692.59
  5. Step 5: Solve for x
    x = 2,692.59/50.38
  6. Step 6: Final answer
    x = 53.45

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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.