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Finding the Fourth Proportional to 264.76, 396.84 and 91.27

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Solution

The fourth proportional to 264.76, 396.84 and 91.27 is: 136.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.76 : 396.84 = 91.27 : x
  2. Step 2: Convert to fraction form
    264.76/396.84 = 91.27/x
  3. Step 3: Cross multiply
    264.76x = 396.84 × 91.27
  4. Step 4: Simplify right side
    264.76x = 36,219.59
  5. Step 5: Solve for x
    x = 36,219.59/264.76
  6. Step 6: Final answer
    x = 136.80

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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.