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Finding the Fourth Proportional to 868.37, 1,198.35 and 475.38

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Solution

The fourth proportional to 868.37, 1,198.35 and 475.38 is: 656.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.37 : 1,198.35 = 475.38 : x
  2. Step 2: Convert to fraction form
    868.37/1,198.35 = 475.38/x
  3. Step 3: Cross multiply
    868.37x = 1,198.35 × 475.38
  4. Step 4: Simplify right side
    868.37x = 569,671.62
  5. Step 5: Solve for x
    x = 569,671.62/868.37
  6. Step 6: Final answer
    x = 656.03

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1.5x scale

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.