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Finding the Fourth Proportional to 186.98, 258.14 and 140.33

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Solution

The fourth proportional to 186.98, 258.14 and 140.33 is: 193.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.98 : 258.14 = 140.33 : x
  2. Step 2: Convert to fraction form
    186.98/258.14 = 140.33/x
  3. Step 3: Cross multiply
    186.98x = 258.14 × 140.33
  4. Step 4: Simplify right side
    186.98x = 36,224.73
  5. Step 5: Solve for x
    x = 36,224.73/186.98
  6. Step 6: Final answer
    x = 193.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.