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Finding the Fourth Proportional to 286.12, 394.98 and 251.56

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Solution

The fourth proportional to 286.12, 394.98 and 251.56 is: 347.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.12 : 394.98 = 251.56 : x
  2. Step 2: Convert to fraction form
    286.12/394.98 = 251.56/x
  3. Step 3: Cross multiply
    286.12x = 394.98 × 251.56
  4. Step 4: Simplify right side
    286.12x = 99,361.17
  5. Step 5: Solve for x
    x = 99,361.17/286.12
  6. Step 6: Final answer
    x = 347.27

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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.