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Finding the Fourth Proportional to 231.95, 347.86 and 67.38

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Solution

The fourth proportional to 231.95, 347.86 and 67.38 is: 101.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.95 : 347.86 = 67.38 : x
  2. Step 2: Convert to fraction form
    231.95/347.86 = 67.38/x
  3. Step 3: Cross multiply
    231.95x = 347.86 × 67.38
  4. Step 4: Simplify right side
    231.95x = 23,438.95
  5. Step 5: Solve for x
    x = 23,438.95/231.95
  6. Step 6: Final answer
    x = 101.05

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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.