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Finding the Fourth Proportional to 275.36, 379.54 and 170.21

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Solution

The fourth proportional to 275.36, 379.54 and 170.21 is: 234.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.36 : 379.54 = 170.21 : x
  2. Step 2: Convert to fraction form
    275.36/379.54 = 170.21/x
  3. Step 3: Cross multiply
    275.36x = 379.54 × 170.21
  4. Step 4: Simplify right side
    275.36x = 64,602.03
  5. Step 5: Solve for x
    x = 64,602.03/275.36
  6. Step 6: Final answer
    x = 234.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.