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Finding the Fourth Proportional to 609.31, 914.21 and 219.36

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Solution

The fourth proportional to 609.31, 914.21 and 219.36 is: 329.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.31 : 914.21 = 219.36 : x
  2. Step 2: Convert to fraction form
    609.31/914.21 = 219.36/x
  3. Step 3: Cross multiply
    609.31x = 914.21 × 219.36
  4. Step 4: Simplify right side
    609.31x = 200,541.11
  5. Step 5: Solve for x
    x = 200,541.11/609.31
  6. Step 6: Final answer
    x = 329.13

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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.