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Finding the Fourth Proportional to 288.12, 396.99 and 272.46

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Solution

The fourth proportional to 288.12, 396.99 and 272.46 is: 375.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.12 : 396.99 = 272.46 : x
  2. Step 2: Convert to fraction form
    288.12/396.99 = 272.46/x
  3. Step 3: Cross multiply
    288.12x = 396.99 × 272.46
  4. Step 4: Simplify right side
    288.12x = 108,163.90
  5. Step 5: Solve for x
    x = 108,163.90/288.12
  6. Step 6: Final answer
    x = 375.41

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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.