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Finding the Fourth Proportional to 609.96, 915 and 199.29

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Solution

The fourth proportional to 609.96, 915 and 199.29 is: 298.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.96 : 915 = 199.29 : x
  2. Step 2: Convert to fraction form
    609.96/915 = 199.29/x
  3. Step 3: Cross multiply
    609.96x = 915 × 199.29
  4. Step 4: Simplify right side
    609.96x = 182,350.35
  5. Step 5: Solve for x
    x = 182,350.35/609.96
  6. Step 6: Final answer
    x = 298.95

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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.