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Finding the Fourth Proportional to 186.29, 279.49 and 138.17

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Solution

The fourth proportional to 186.29, 279.49 and 138.17 is: 207.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.29 : 279.49 = 138.17 : x
  2. Step 2: Convert to fraction form
    186.29/279.49 = 138.17/x
  3. Step 3: Cross multiply
    186.29x = 279.49 × 138.17
  4. Step 4: Simplify right side
    186.29x = 38,616.37
  5. Step 5: Solve for x
    x = 38,616.37/186.29
  6. Step 6: Final answer
    x = 207.29

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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.