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Finding the Fourth Proportional to 186.72, 258.90 and 179.16

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Solution

The fourth proportional to 186.72, 258.90 and 179.16 is: 248.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.72 : 258.90 = 179.16 : x
  2. Step 2: Convert to fraction form
    186.72/258.90 = 179.16/x
  3. Step 3: Cross multiply
    186.72x = 258.90 × 179.16
  4. Step 4: Simplify right side
    186.72x = 46,384.52
  5. Step 5: Solve for x
    x = 46,384.52/186.72
  6. Step 6: Final answer
    x = 248.42

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.