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Finding the Fourth Proportional to 609.18, 914.22 and 447.30

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Solution

The fourth proportional to 609.18, 914.22 and 447.30 is: 671.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.18 : 914.22 = 447.30 : x
  2. Step 2: Convert to fraction form
    609.18/914.22 = 447.30/x
  3. Step 3: Cross multiply
    609.18x = 914.22 × 447.30
  4. Step 4: Simplify right side
    609.18x = 408,930.61
  5. Step 5: Solve for x
    x = 408,930.61/609.18
  6. Step 6: Final answer
    x = 671.28

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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.