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Finding the Fourth Proportional to 275.08, 412.26 and 112.72

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Solution

The fourth proportional to 275.08, 412.26 and 112.72 is: 168.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.08 : 412.26 = 112.72 : x
  2. Step 2: Convert to fraction form
    275.08/412.26 = 112.72/x
  3. Step 3: Cross multiply
    275.08x = 412.26 × 112.72
  4. Step 4: Simplify right side
    275.08x = 46,469.95
  5. Step 5: Solve for x
    x = 46,469.95/275.08
  6. Step 6: Final answer
    x = 168.93

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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.