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Finding the Fourth Proportional to 609.93, 914.79 and 199.11

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Solution

The fourth proportional to 609.93, 914.79 and 199.11 is: 298.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.93 : 914.79 = 199.11 : x
  2. Step 2: Convert to fraction form
    609.93/914.79 = 199.11/x
  3. Step 3: Cross multiply
    609.93x = 914.79 × 199.11
  4. Step 4: Simplify right side
    609.93x = 182,143.84
  5. Step 5: Solve for x
    x = 182,143.84/609.93
  6. Step 6: Final answer
    x = 298.63

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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.