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Finding the Fourth Proportional to 868.15, 1,198.04 and 475.19

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Solution

The fourth proportional to 868.15, 1,198.04 and 475.19 is: 655.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.15 : 1,198.04 = 475.19 : x
  2. Step 2: Convert to fraction form
    868.15/1,198.04 = 475.19/x
  3. Step 3: Cross multiply
    868.15x = 1,198.04 × 475.19
  4. Step 4: Simplify right side
    868.15x = 569,288.26
  5. Step 5: Solve for x
    x = 569,288.26/868.15
  6. Step 6: Final answer
    x = 655.75

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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.