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Finding the Fourth Proportional to 284.72, 426.94 and 122.31

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Solution

The fourth proportional to 284.72, 426.94 and 122.31 is: 183.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.72 : 426.94 = 122.31 : x
  2. Step 2: Convert to fraction form
    284.72/426.94 = 122.31/x
  3. Step 3: Cross multiply
    284.72x = 426.94 × 122.31
  4. Step 4: Simplify right side
    284.72x = 52,218.73
  5. Step 5: Solve for x
    x = 52,218.73/284.72
  6. Step 6: Final answer
    x = 183.41

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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.