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Finding the Fourth Proportional to 264.55, 396.85 and 91.19

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Solution

The fourth proportional to 264.55, 396.85 and 91.19 is: 136.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.55 : 396.85 = 91.19 : x
  2. Step 2: Convert to fraction form
    264.55/396.85 = 91.19/x
  3. Step 3: Cross multiply
    264.55x = 396.85 × 91.19
  4. Step 4: Simplify right side
    264.55x = 36,188.60
  5. Step 5: Solve for x
    x = 36,188.60/264.55
  6. Step 6: Final answer
    x = 136.79

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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.