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Finding the Fourth Proportional to 231.98, 319.20 and 226.51

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Solution

The fourth proportional to 231.98, 319.20 and 226.51 is: 311.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.98 : 319.20 = 226.51 : x
  2. Step 2: Convert to fraction form
    231.98/319.20 = 226.51/x
  3. Step 3: Cross multiply
    231.98x = 319.20 × 226.51
  4. Step 4: Simplify right side
    231.98x = 72,301.99
  5. Step 5: Solve for x
    x = 72,301.99/231.98
  6. Step 6: Final answer
    x = 311.67

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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.