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Finding the Fourth Proportional to 283.95, 391.95 and 196.74

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Solution

The fourth proportional to 283.95, 391.95 and 196.74 is: 271.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.95 : 391.95 = 196.74 : x
  2. Step 2: Convert to fraction form
    283.95/391.95 = 196.74/x
  3. Step 3: Cross multiply
    283.95x = 391.95 × 196.74
  4. Step 4: Simplify right side
    283.95x = 77,112.24
  5. Step 5: Solve for x
    x = 77,112.24/283.95
  6. Step 6: Final answer
    x = 271.57

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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.