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Finding the Fourth Proportional to 49.66, 74.43 and 47.98

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Solution

The fourth proportional to 49.66, 74.43 and 47.98 is: 71.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.66 : 74.43 = 47.98 : x
  2. Step 2: Convert to fraction form
    49.66/74.43 = 47.98/x
  3. Step 3: Cross multiply
    49.66x = 74.43 × 47.98
  4. Step 4: Simplify right side
    49.66x = 3,571.15
  5. Step 5: Solve for x
    x = 3,571.15/49.66
  6. Step 6: Final answer
    x = 71.91

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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.