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Finding the Fourth Proportional to 264.58, 396.79 and 91.29

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Solution

The fourth proportional to 264.58, 396.79 and 91.29 is: 136.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.58 : 396.79 = 91.29 : x
  2. Step 2: Convert to fraction form
    264.58/396.79 = 91.29/x
  3. Step 3: Cross multiply
    264.58x = 396.79 × 91.29
  4. Step 4: Simplify right side
    264.58x = 36,222.96
  5. Step 5: Solve for x
    x = 36,222.96/264.58
  6. Step 6: Final answer
    x = 136.91

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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.