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Finding the Fourth Proportional to 262.82, 394.12 and 80.17

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Solution

The fourth proportional to 262.82, 394.12 and 80.17 is: 120.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.82 : 394.12 = 80.17 : x
  2. Step 2: Convert to fraction form
    262.82/394.12 = 80.17/x
  3. Step 3: Cross multiply
    262.82x = 394.12 × 80.17
  4. Step 4: Simplify right side
    262.82x = 31,595.41
  5. Step 5: Solve for x
    x = 31,595.41/262.82
  6. Step 6: Final answer
    x = 120.22

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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.