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Finding the Fourth Proportional to 231.93, 347.78 and 69.57

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Solution

The fourth proportional to 231.93, 347.78 and 69.57 is: 104.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.93 : 347.78 = 69.57 : x
  2. Step 2: Convert to fraction form
    231.93/347.78 = 69.57/x
  3. Step 3: Cross multiply
    231.93x = 347.78 × 69.57
  4. Step 4: Simplify right side
    231.93x = 24,195.23
  5. Step 5: Solve for x
    x = 24,195.23/231.93
  6. Step 6: Final answer
    x = 104.32

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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.