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Finding the Fourth Proportional to 284.78, 426.98 and 111.44

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Solution

The fourth proportional to 284.78, 426.98 and 111.44 is: 167.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.78 : 426.98 = 111.44 : x
  2. Step 2: Convert to fraction form
    284.78/426.98 = 111.44/x
  3. Step 3: Cross multiply
    284.78x = 426.98 × 111.44
  4. Step 4: Simplify right side
    284.78x = 47,582.65
  5. Step 5: Solve for x
    x = 47,582.65/284.78
  6. Step 6: Final answer
    x = 167.09

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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.