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Finding the Fourth Proportional to 280.25, 386.88 and 182.12

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Solution

The fourth proportional to 280.25, 386.88 and 182.12 is: 251.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.25 : 386.88 = 182.12 : x
  2. Step 2: Convert to fraction form
    280.25/386.88 = 182.12/x
  3. Step 3: Cross multiply
    280.25x = 386.88 × 182.12
  4. Step 4: Simplify right side
    280.25x = 70,458.59
  5. Step 5: Solve for x
    x = 70,458.59/280.25
  6. Step 6: Final answer
    x = 251.41

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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.