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Finding the Fourth Proportional to 287.21, 396.20 and 182.12

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Solution

The fourth proportional to 287.21, 396.20 and 182.12 is: 251.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.21 : 396.20 = 182.12 : x
  2. Step 2: Convert to fraction form
    287.21/396.20 = 182.12/x
  3. Step 3: Cross multiply
    287.21x = 396.20 × 182.12
  4. Step 4: Simplify right side
    287.21x = 72,155.94
  5. Step 5: Solve for x
    x = 72,155.94/287.21
  6. Step 6: Final answer
    x = 251.23

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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.