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Finding the Fourth Proportional to 882.21, 1,323.31 and 519.31

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Solution

The fourth proportional to 882.21, 1,323.31 and 519.31 is: 778.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.21 : 1,323.31 = 519.31 : x
  2. Step 2: Convert to fraction form
    882.21/1,323.31 = 519.31/x
  3. Step 3: Cross multiply
    882.21x = 1,323.31 × 519.31
  4. Step 4: Simplify right side
    882.21x = 687,198.90
  5. Step 5: Solve for x
    x = 687,198.90/882.21
  6. Step 6: Final answer
    x = 778.95

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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.