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Finding the Fourth Proportional to 50.48, 69.98 and 48.79

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Solution

The fourth proportional to 50.48, 69.98 and 48.79 is: 67.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.48 : 69.98 = 48.79 : x
  2. Step 2: Convert to fraction form
    50.48/69.98 = 48.79/x
  3. Step 3: Cross multiply
    50.48x = 69.98 × 48.79
  4. Step 4: Simplify right side
    50.48x = 3,414.27
  5. Step 5: Solve for x
    x = 3,414.27/50.48
  6. Step 6: Final answer
    x = 67.64

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.