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Finding the Fourth Proportional to 892.87, 1,339.59 and 424.54

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Solution

The fourth proportional to 892.87, 1,339.59 and 424.54 is: 636.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.87 : 1,339.59 = 424.54 : x
  2. Step 2: Convert to fraction form
    892.87/1,339.59 = 424.54/x
  3. Step 3: Cross multiply
    892.87x = 1,339.59 × 424.54
  4. Step 4: Simplify right side
    892.87x = 568,709.54
  5. Step 5: Solve for x
    x = 568,709.54/892.87
  6. Step 6: Final answer
    x = 636.95

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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.