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Finding the Fourth Proportional to 609.41, 913.72 and 219.22

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Solution

The fourth proportional to 609.41, 913.72 and 219.22 is: 328.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.41 : 913.72 = 219.22 : x
  2. Step 2: Convert to fraction form
    609.41/913.72 = 219.22/x
  3. Step 3: Cross multiply
    609.41x = 913.72 × 219.22
  4. Step 4: Simplify right side
    609.41x = 200,300.03
  5. Step 5: Solve for x
    x = 200,300.03/609.41
  6. Step 6: Final answer
    x = 328.68

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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.