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Finding the Fourth Proportional to 868.84, 1,198.72 and 519.44

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Solution

The fourth proportional to 868.84, 1,198.72 and 519.44 is: 716.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.84 : 1,198.72 = 519.44 : x
  2. Step 2: Convert to fraction form
    868.84/1,198.72 = 519.44/x
  3. Step 3: Cross multiply
    868.84x = 1,198.72 × 519.44
  4. Step 4: Simplify right side
    868.84x = 622,663.12
  5. Step 5: Solve for x
    x = 622,663.12/868.84
  6. Step 6: Final answer
    x = 716.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.