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Finding the Fourth Proportional to 231.90, 347.31 and 166.98

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Solution

The fourth proportional to 231.90, 347.31 and 166.98 is: 250.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.90 : 347.31 = 166.98 : x
  2. Step 2: Convert to fraction form
    231.90/347.31 = 166.98/x
  3. Step 3: Cross multiply
    231.90x = 347.31 × 166.98
  4. Step 4: Simplify right side
    231.90x = 57,993.82
  5. Step 5: Solve for x
    x = 57,993.82/231.90
  6. Step 6: Final answer
    x = 250.08

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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.