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Finding the Fourth Proportional to 453.91, 680.89 and 129.30

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Solution

The fourth proportional to 453.91, 680.89 and 129.30 is: 193.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.91 : 680.89 = 129.30 : x
  2. Step 2: Convert to fraction form
    453.91/680.89 = 129.30/x
  3. Step 3: Cross multiply
    453.91x = 680.89 × 129.30
  4. Step 4: Simplify right side
    453.91x = 88,039.08
  5. Step 5: Solve for x
    x = 88,039.08/453.91
  6. Step 6: Final answer
    x = 193.96

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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.