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Finding the Fourth Proportional to 186.73, 280.09 and 49.79

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Solution

The fourth proportional to 186.73, 280.09 and 49.79 is: 74.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.73 : 280.09 = 49.79 : x
  2. Step 2: Convert to fraction form
    186.73/280.09 = 49.79/x
  3. Step 3: Cross multiply
    186.73x = 280.09 × 49.79
  4. Step 4: Simplify right side
    186.73x = 13,944.16
  5. Step 5: Solve for x
    x = 13,944.16/186.73
  6. Step 6: Final answer
    x = 74.68

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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.