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Finding the Fourth Proportional to 186.79, 279.93 and 154.49

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Solution

The fourth proportional to 186.79, 279.93 and 154.49 is: 231.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.79 : 279.93 = 154.49 : x
  2. Step 2: Convert to fraction form
    186.79/279.93 = 154.49/x
  3. Step 3: Cross multiply
    186.79x = 279.93 × 154.49
  4. Step 4: Simplify right side
    186.79x = 43,247.09
  5. Step 5: Solve for x
    x = 43,247.09/186.79
  6. Step 6: Final answer
    x = 231.53

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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.