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Finding the Fourth Proportional to 231.66, 346.68 and 192.78

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Solution

The fourth proportional to 231.66, 346.68 and 192.78 is: 288.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.66 : 346.68 = 192.78 : x
  2. Step 2: Convert to fraction form
    231.66/346.68 = 192.78/x
  3. Step 3: Cross multiply
    231.66x = 346.68 × 192.78
  4. Step 4: Simplify right side
    231.66x = 66,832.97
  5. Step 5: Solve for x
    x = 66,832.97/231.66
  6. Step 6: Final answer
    x = 288.50

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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.