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Finding the Fourth Proportional to 454.31, 681.21 and 146.09

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Solution

The fourth proportional to 454.31, 681.21 and 146.09 is: 219.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.31 : 681.21 = 146.09 : x
  2. Step 2: Convert to fraction form
    454.31/681.21 = 146.09/x
  3. Step 3: Cross multiply
    454.31x = 681.21 × 146.09
  4. Step 4: Simplify right side
    454.31x = 99,517.97
  5. Step 5: Solve for x
    x = 99,517.97/454.31
  6. Step 6: Final answer
    x = 219.05

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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.