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Finding the Fourth Proportional to 264.66, 397.01 and 82.18

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Solution

The fourth proportional to 264.66, 397.01 and 82.18 is: 123.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.66 : 397.01 = 82.18 : x
  2. Step 2: Convert to fraction form
    264.66/397.01 = 82.18/x
  3. Step 3: Cross multiply
    264.66x = 397.01 × 82.18
  4. Step 4: Simplify right side
    264.66x = 32,626.28
  5. Step 5: Solve for x
    x = 32,626.28/264.66
  6. Step 6: Final answer
    x = 123.28

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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.