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Finding the Fourth Proportional to 868.31, 1,198.30 and 475.37

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Solution

The fourth proportional to 868.31, 1,198.30 and 475.37 is: 656.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.31 : 1,198.30 = 475.37 : x
  2. Step 2: Convert to fraction form
    868.31/1,198.30 = 475.37/x
  3. Step 3: Cross multiply
    868.31x = 1,198.30 × 475.37
  4. Step 4: Simplify right side
    868.31x = 569,628.69
  5. Step 5: Solve for x
    x = 569,628.69/868.31
  6. Step 6: Final answer
    x = 656.02

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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.