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Finding the Fourth Proportional to 436.52, 654.44 and 219.80

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Solution

The fourth proportional to 436.52, 654.44 and 219.80 is: 329.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.52 : 654.44 = 219.80 : x
  2. Step 2: Convert to fraction form
    436.52/654.44 = 219.80/x
  3. Step 3: Cross multiply
    436.52x = 654.44 × 219.80
  4. Step 4: Simplify right side
    436.52x = 143,845.91
  5. Step 5: Solve for x
    x = 143,845.91/436.52
  6. Step 6: Final answer
    x = 329.53

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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.