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Finding the Fourth Proportional to 287.47, 396.46 and 194.20

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Solution

The fourth proportional to 287.47, 396.46 and 194.20 is: 267.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.47 : 396.46 = 194.20 : x
  2. Step 2: Convert to fraction form
    287.47/396.46 = 194.20/x
  3. Step 3: Cross multiply
    287.47x = 396.46 × 194.20
  4. Step 4: Simplify right side
    287.47x = 76,992.53
  5. Step 5: Solve for x
    x = 76,992.53/287.47
  6. Step 6: Final answer
    x = 267.83

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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.