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Finding the Fourth Proportional to 49.37, 67.93 and 42.79

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Solution

The fourth proportional to 49.37, 67.93 and 42.79 is: 58.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.37 : 67.93 = 42.79 : x
  2. Step 2: Convert to fraction form
    49.37/67.93 = 42.79/x
  3. Step 3: Cross multiply
    49.37x = 67.93 × 42.79
  4. Step 4: Simplify right side
    49.37x = 2,906.45
  5. Step 5: Solve for x
    x = 2,906.45/49.37
  6. Step 6: Final answer
    x = 58.88

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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.