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Finding the Fourth Proportional to 609.11, 913.67 and 198.28

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Solution

The fourth proportional to 609.11, 913.67 and 198.28 is: 297.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.11 : 913.67 = 198.28 : x
  2. Step 2: Convert to fraction form
    609.11/913.67 = 198.28/x
  3. Step 3: Cross multiply
    609.11x = 913.67 × 198.28
  4. Step 4: Simplify right side
    609.11x = 181,156.93
  5. Step 5: Solve for x
    x = 181,156.93/609.11
  6. Step 6: Final answer
    x = 297.41

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.