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Finding the Fourth Proportional to 868.07, 1,197.96 and 518.96

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Solution

The fourth proportional to 868.07, 1,197.96 and 518.96 is: 716.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.07 : 1,197.96 = 518.96 : x
  2. Step 2: Convert to fraction form
    868.07/1,197.96 = 518.96/x
  3. Step 3: Cross multiply
    868.07x = 1,197.96 × 518.96
  4. Step 4: Simplify right side
    868.07x = 621,693.32
  5. Step 5: Solve for x
    x = 621,693.32/868.07
  6. Step 6: Final answer
    x = 716.18

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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.