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Finding the Fourth Proportional to 280.82, 387.32 and 170.25

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Solution

The fourth proportional to 280.82, 387.32 and 170.25 is: 234.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.82 : 387.32 = 170.25 : x
  2. Step 2: Convert to fraction form
    280.82/387.32 = 170.25/x
  3. Step 3: Cross multiply
    280.82x = 387.32 × 170.25
  4. Step 4: Simplify right side
    280.82x = 65,940.38
  5. Step 5: Solve for x
    x = 65,940.38/280.82
  6. Step 6: Final answer
    x = 234.82

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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.