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Finding the Fourth Proportional to 274.26, 411.50 and 164.78

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Solution

The fourth proportional to 274.26, 411.50 and 164.78 is: 247.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.26 : 411.50 = 164.78 : x
  2. Step 2: Convert to fraction form
    274.26/411.50 = 164.78/x
  3. Step 3: Cross multiply
    274.26x = 411.50 × 164.78
  4. Step 4: Simplify right side
    274.26x = 67,805.94
  5. Step 5: Solve for x
    x = 67,805.94/274.26
  6. Step 6: Final answer
    x = 247.23

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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.