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Finding the Fourth Proportional to 274.05, 411.14 and 100.81

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Solution

The fourth proportional to 274.05, 411.14 and 100.81 is: 151.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.05 : 411.14 = 100.81 : x
  2. Step 2: Convert to fraction form
    274.05/411.14 = 100.81/x
  3. Step 3: Cross multiply
    274.05x = 411.14 × 100.81
  4. Step 4: Simplify right side
    274.05x = 41,447.79
  5. Step 5: Solve for x
    x = 41,447.79/274.05
  6. Step 6: Final answer
    x = 151.24

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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.