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Finding the Fourth Proportional to 264.97, 397.30 and 221.91

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Solution

The fourth proportional to 264.97, 397.30 and 221.91 is: 332.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.97 : 397.30 = 221.91 : x
  2. Step 2: Convert to fraction form
    264.97/397.30 = 221.91/x
  3. Step 3: Cross multiply
    264.97x = 397.30 × 221.91
  4. Step 4: Simplify right side
    264.97x = 88,164.84
  5. Step 5: Solve for x
    x = 88,164.84/264.97
  6. Step 6: Final answer
    x = 332.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.