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Finding the Fourth Proportional to 231.98, 347.56 and 206.87

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Solution

The fourth proportional to 231.98, 347.56 and 206.87 is: 309.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.98 : 347.56 = 206.87 : x
  2. Step 2: Convert to fraction form
    231.98/347.56 = 206.87/x
  3. Step 3: Cross multiply
    231.98x = 347.56 × 206.87
  4. Step 4: Simplify right side
    231.98x = 71,899.74
  5. Step 5: Solve for x
    x = 71,899.74/231.98
  6. Step 6: Final answer
    x = 309.94

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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.