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Finding the Fourth Proportional to 274.25, 411.56 and 129.98

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Solution

The fourth proportional to 274.25, 411.56 and 129.98 is: 195.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.25 : 411.56 = 129.98 : x
  2. Step 2: Convert to fraction form
    274.25/411.56 = 129.98/x
  3. Step 3: Cross multiply
    274.25x = 411.56 × 129.98
  4. Step 4: Simplify right side
    274.25x = 53,493.92
  5. Step 5: Solve for x
    x = 53,493.92/274.25
  6. Step 6: Final answer
    x = 195.06

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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.