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Finding the Fourth Proportional to 50.72, 69.88 and 38.28

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Solution

The fourth proportional to 50.72, 69.88 and 38.28 is: 52.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.72 : 69.88 = 38.28 : x
  2. Step 2: Convert to fraction form
    50.72/69.88 = 38.28/x
  3. Step 3: Cross multiply
    50.72x = 69.88 × 38.28
  4. Step 4: Simplify right side
    50.72x = 2,675.01
  5. Step 5: Solve for x
    x = 2,675.01/50.72
  6. Step 6: Final answer
    x = 52.74

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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.