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Finding the Fourth Proportional to 868.63, 1,199.09 and 519.25

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Solution

The fourth proportional to 868.63, 1,199.09 and 519.25 is: 716.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.63 : 1,199.09 = 519.25 : x
  2. Step 2: Convert to fraction form
    868.63/1,199.09 = 519.25/x
  3. Step 3: Cross multiply
    868.63x = 1,199.09 × 519.25
  4. Step 4: Simplify right side
    868.63x = 622,624.89
  5. Step 5: Solve for x
    x = 622,624.89/868.63
  6. Step 6: Final answer
    x = 716.79

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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.