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Finding the Fourth Proportional to 186.82, 280.26 and 84.10

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Solution

The fourth proportional to 186.82, 280.26 and 84.10 is: 126.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.82 : 280.26 = 84.10 : x
  2. Step 2: Convert to fraction form
    186.82/280.26 = 84.10/x
  3. Step 3: Cross multiply
    186.82x = 280.26 × 84.10
  4. Step 4: Simplify right side
    186.82x = 23,569.87
  5. Step 5: Solve for x
    x = 23,569.87/186.82
  6. Step 6: Final answer
    x = 126.16

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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.