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Finding the Fourth Proportional to 382.79, 574.20 and 122.82

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Solution

The fourth proportional to 382.79, 574.20 and 122.82 is: 184.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.79 : 574.20 = 122.82 : x
  2. Step 2: Convert to fraction form
    382.79/574.20 = 122.82/x
  3. Step 3: Cross multiply
    382.79x = 574.20 × 122.82
  4. Step 4: Simplify right side
    382.79x = 70,519.76
  5. Step 5: Solve for x
    x = 70,519.76/382.79
  6. Step 6: Final answer
    x = 184.23

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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.