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Finding the Fourth Proportional to 186.84, 257.99 and 140.27

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Solution

The fourth proportional to 186.84, 257.99 and 140.27 is: 193.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.84 : 257.99 = 140.27 : x
  2. Step 2: Convert to fraction form
    186.84/257.99 = 140.27/x
  3. Step 3: Cross multiply
    186.84x = 257.99 × 140.27
  4. Step 4: Simplify right side
    186.84x = 36,186.27
  5. Step 5: Solve for x
    x = 36,186.27/186.84
  6. Step 6: Final answer
    x = 193.68

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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.