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Finding the Fourth Proportional to 274.98, 412.71 and 112.80

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Solution

The fourth proportional to 274.98, 412.71 and 112.80 is: 169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.98 : 412.71 = 112.80 : x
  2. Step 2: Convert to fraction form
    274.98/412.71 = 112.80/x
  3. Step 3: Cross multiply
    274.98x = 412.71 × 112.80
  4. Step 4: Simplify right side
    274.98x = 46,553.69
  5. Step 5: Solve for x
    x = 46,553.69/274.98
  6. Step 6: Final answer
    x = 169.30

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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.