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Finding the Fourth Proportional to 453.84, 680.74 and 129.22

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Solution

The fourth proportional to 453.84, 680.74 and 129.22 is: 193.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.84 : 680.74 = 129.22 : x
  2. Step 2: Convert to fraction form
    453.84/680.74 = 129.22/x
  3. Step 3: Cross multiply
    453.84x = 680.74 × 129.22
  4. Step 4: Simplify right side
    453.84x = 87,965.22
  5. Step 5: Solve for x
    x = 87,965.22/453.84
  6. Step 6: Final answer
    x = 193.82

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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.