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Finding the Fourth Proportional to 275.21, 379.80 and 164.75

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Solution

The fourth proportional to 275.21, 379.80 and 164.75 is: 227.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.21 : 379.80 = 164.75 : x
  2. Step 2: Convert to fraction form
    275.21/379.80 = 164.75/x
  3. Step 3: Cross multiply
    275.21x = 379.80 × 164.75
  4. Step 4: Simplify right side
    275.21x = 62,572.05
  5. Step 5: Solve for x
    x = 62,572.05/275.21
  6. Step 6: Final answer
    x = 227.36

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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.