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Finding the Fourth Proportional to 868, 1,198.08 and 588.64

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Solution

The fourth proportional to 868, 1,198.08 and 588.64 is: 812.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    868 : 1,198.08 = 588.64 : x
  2. Step 2: Convert to fraction form
    868/1,198.08 = 588.64/x
  3. Step 3: Cross multiply
    868x = 1,198.08 × 588.64
  4. Step 4: Simplify right side
    868x = 705,237.81
  5. Step 5: Solve for x
    x = 705,237.81/868
  6. Step 6: Final answer
    x = 812.49

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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.