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Finding the Fourth Proportional to 453.90, 680.87 and 129.29

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Solution

The fourth proportional to 453.90, 680.87 and 129.29 is: 193.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.90 : 680.87 = 129.29 : x
  2. Step 2: Convert to fraction form
    453.90/680.87 = 129.29/x
  3. Step 3: Cross multiply
    453.90x = 680.87 × 129.29
  4. Step 4: Simplify right side
    453.90x = 88,029.68
  5. Step 5: Solve for x
    x = 88,029.68/453.90
  6. Step 6: Final answer
    x = 193.94

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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.