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Finding the Fourth Proportional to 245.20, 338.16 and 231.52

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Solution

The fourth proportional to 245.20, 338.16 and 231.52 is: 319.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.20 : 338.16 = 231.52 : x
  2. Step 2: Convert to fraction form
    245.20/338.16 = 231.52/x
  3. Step 3: Cross multiply
    245.20x = 338.16 × 231.52
  4. Step 4: Simplify right side
    245.20x = 78,290.80
  5. Step 5: Solve for x
    x = 78,290.80/245.20
  6. Step 6: Final answer
    x = 319.29

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.