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Finding the Fourth Proportional to 216.78, 298.95 and 141.96

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Solution

The fourth proportional to 216.78, 298.95 and 141.96 is: 195.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.78 : 298.95 = 141.96 : x
  2. Step 2: Convert to fraction form
    216.78/298.95 = 141.96/x
  3. Step 3: Cross multiply
    216.78x = 298.95 × 141.96
  4. Step 4: Simplify right side
    216.78x = 42,438.94
  5. Step 5: Solve for x
    x = 42,438.94/216.78
  6. Step 6: Final answer
    x = 195.77

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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.