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Finding the Fourth Proportional to 868.13, 1,198.04 and 518.88

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Solution

The fourth proportional to 868.13, 1,198.04 and 518.88 is: 716.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.13 : 1,198.04 = 518.88 : x
  2. Step 2: Convert to fraction form
    868.13/1,198.04 = 518.88/x
  3. Step 3: Cross multiply
    868.13x = 1,198.04 × 518.88
  4. Step 4: Simplify right side
    868.13x = 621,636.40
  5. Step 5: Solve for x
    x = 621,636.40/868.13
  6. Step 6: Final answer
    x = 716.07

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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.