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Finding the Fourth Proportional to 288.27, 397.48 and 272.88

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Solution

The fourth proportional to 288.27, 397.48 and 272.88 is: 376.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.27 : 397.48 = 272.88 : x
  2. Step 2: Convert to fraction form
    288.27/397.48 = 272.88/x
  3. Step 3: Cross multiply
    288.27x = 397.48 × 272.88
  4. Step 4: Simplify right side
    288.27x = 108,464.34
  5. Step 5: Solve for x
    x = 108,464.34/288.27
  6. Step 6: Final answer
    x = 376.26

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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.