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Finding the Fourth Proportional to 255.80, 352.79 and 186.09

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Solution

The fourth proportional to 255.80, 352.79 and 186.09 is: 256.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.80 : 352.79 = 186.09 : x
  2. Step 2: Convert to fraction form
    255.80/352.79 = 186.09/x
  3. Step 3: Cross multiply
    255.80x = 352.79 × 186.09
  4. Step 4: Simplify right side
    255.80x = 65,651.11
  5. Step 5: Solve for x
    x = 65,651.11/255.80
  6. Step 6: Final answer
    x = 256.65

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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.