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Finding the Fourth Proportional to 435.90, 654.06 and 219.63

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Solution

The fourth proportional to 435.90, 654.06 and 219.63 is: 329.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.90 : 654.06 = 219.63 : x
  2. Step 2: Convert to fraction form
    435.90/654.06 = 219.63/x
  3. Step 3: Cross multiply
    435.90x = 654.06 × 219.63
  4. Step 4: Simplify right side
    435.90x = 143,651.20
  5. Step 5: Solve for x
    x = 143,651.20/435.90
  6. Step 6: Final answer
    x = 329.55

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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.