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Finding the Fourth Proportional to 245.20, 338.50 and 192.66

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Solution

The fourth proportional to 245.20, 338.50 and 192.66 is: 265.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.20 : 338.50 = 192.66 : x
  2. Step 2: Convert to fraction form
    245.20/338.50 = 192.66/x
  3. Step 3: Cross multiply
    245.20x = 338.50 × 192.66
  4. Step 4: Simplify right side
    245.20x = 65,213.72
  5. Step 5: Solve for x
    x = 65,213.72/245.20
  6. Step 6: Final answer
    x = 265.96

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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.