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Finding the Fourth Proportional to 283.94, 391.72 and 178.98

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Solution

The fourth proportional to 283.94, 391.72 and 178.98 is: 246.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.94 : 391.72 = 178.98 : x
  2. Step 2: Convert to fraction form
    283.94/391.72 = 178.98/x
  3. Step 3: Cross multiply
    283.94x = 391.72 × 178.98
  4. Step 4: Simplify right side
    283.94x = 70,110.05
  5. Step 5: Solve for x
    x = 70,110.05/283.94
  6. Step 6: Final answer
    x = 246.92

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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.