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Finding the Fourth Proportional to 264.64, 396.96 and 82.12

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Solution

The fourth proportional to 264.64, 396.96 and 82.12 is: 123.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.64 : 396.96 = 82.12 : x
  2. Step 2: Convert to fraction form
    264.64/396.96 = 82.12/x
  3. Step 3: Cross multiply
    264.64x = 396.96 × 82.12
  4. Step 4: Simplify right side
    264.64x = 32,598.36
  5. Step 5: Solve for x
    x = 32,598.36/264.64
  6. Step 6: Final answer
    x = 123.18

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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.