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Finding the Fourth Proportional to 275.68, 380.43 and 165.09

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Solution

The fourth proportional to 275.68, 380.43 and 165.09 is: 227.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.68 : 380.43 = 165.09 : x
  2. Step 2: Convert to fraction form
    275.68/380.43 = 165.09/x
  3. Step 3: Cross multiply
    275.68x = 380.43 × 165.09
  4. Step 4: Simplify right side
    275.68x = 62,803.29
  5. Step 5: Solve for x
    x = 62,803.29/275.68
  6. Step 6: Final answer
    x = 227.81

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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.