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Finding the Fourth Proportional to 50.75, 76.18 and 50.53

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Solution

The fourth proportional to 50.75, 76.18 and 50.53 is: 75.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.75 : 76.18 = 50.53 : x
  2. Step 2: Convert to fraction form
    50.75/76.18 = 50.53/x
  3. Step 3: Cross multiply
    50.75x = 76.18 × 50.53
  4. Step 4: Simplify right side
    50.75x = 3,849.38
  5. Step 5: Solve for x
    x = 3,849.38/50.75
  6. Step 6: Final answer
    x = 75.85

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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.