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Finding the Fourth Proportional to 287.56, 396.12 and 252.46

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Solution

The fourth proportional to 287.56, 396.12 and 252.46 is: 347.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.56 : 396.12 = 252.46 : x
  2. Step 2: Convert to fraction form
    287.56/396.12 = 252.46/x
  3. Step 3: Cross multiply
    287.56x = 396.12 × 252.46
  4. Step 4: Simplify right side
    287.56x = 100,004.46
  5. Step 5: Solve for x
    x = 100,004.46/287.56
  6. Step 6: Final answer
    x = 347.77

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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.