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Finding the Fourth Proportional to 609.15, 913.98 and 243.85

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Solution

The fourth proportional to 609.15, 913.98 and 243.85 is: 365.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.15 : 913.98 = 243.85 : x
  2. Step 2: Convert to fraction form
    609.15/913.98 = 243.85/x
  3. Step 3: Cross multiply
    609.15x = 913.98 × 243.85
  4. Step 4: Simplify right side
    609.15x = 222,874.25
  5. Step 5: Solve for x
    x = 222,874.25/609.15
  6. Step 6: Final answer
    x = 365.88

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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.