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Finding the Fourth Proportional to 186.80, 279.87 and 135.77

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Solution

The fourth proportional to 186.80, 279.87 and 135.77 is: 203.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.80 : 279.87 = 135.77 : x
  2. Step 2: Convert to fraction form
    186.80/279.87 = 135.77/x
  3. Step 3: Cross multiply
    186.80x = 279.87 × 135.77
  4. Step 4: Simplify right side
    186.80x = 37,996.55
  5. Step 5: Solve for x
    x = 37,996.55/186.80
  6. Step 6: Final answer
    x = 203.41

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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.