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Finding the Fourth Proportional to 231.31, 346.90 and 228.98

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Solution

The fourth proportional to 231.31, 346.90 and 228.98 is: 343.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.31 : 346.90 = 228.98 : x
  2. Step 2: Convert to fraction form
    231.31/346.90 = 228.98/x
  3. Step 3: Cross multiply
    231.31x = 346.90 × 228.98
  4. Step 4: Simplify right side
    231.31x = 79,433.16
  5. Step 5: Solve for x
    x = 79,433.16/231.31
  6. Step 6: Final answer
    x = 343.41

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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.