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Finding the Fourth Proportional to 275.32, 379.91 and 164.78

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Solution

The fourth proportional to 275.32, 379.91 and 164.78 is: 227.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.32 : 379.91 = 164.78 : x
  2. Step 2: Convert to fraction form
    275.32/379.91 = 164.78/x
  3. Step 3: Cross multiply
    275.32x = 379.91 × 164.78
  4. Step 4: Simplify right side
    275.32x = 62,598.85
  5. Step 5: Solve for x
    x = 62,598.85/275.32
  6. Step 6: Final answer
    x = 227.37

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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.