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Finding the Fourth Proportional to 450.69, 675.90 and 219.45

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Solution

The fourth proportional to 450.69, 675.90 and 219.45 is: 329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.69 : 675.90 = 219.45 : x
  2. Step 2: Convert to fraction form
    450.69/675.90 = 219.45/x
  3. Step 3: Cross multiply
    450.69x = 675.90 × 219.45
  4. Step 4: Simplify right side
    450.69x = 148,326.26
  5. Step 5: Solve for x
    x = 148,326.26/450.69
  6. Step 6: Final answer
    x = 329.11

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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.