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Finding the Fourth Proportional to 50.72, 76 and 38.72

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Solution

The fourth proportional to 50.72, 76 and 38.72 is: 58.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.72 : 76 = 38.72 : x
  2. Step 2: Convert to fraction form
    50.72/76 = 38.72/x
  3. Step 3: Cross multiply
    50.72x = 76 × 38.72
  4. Step 4: Simplify right side
    50.72x = 2,942.72
  5. Step 5: Solve for x
    x = 2,942.72/50.72
  6. Step 6: Final answer
    x = 58.02

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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.