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Finding the Fourth Proportional to 275.60, 380.31 and 165.08

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Solution

The fourth proportional to 275.60, 380.31 and 165.08 is: 227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.60 : 380.31 = 165.08 : x
  2. Step 2: Convert to fraction form
    275.60/380.31 = 165.08/x
  3. Step 3: Cross multiply
    275.60x = 380.31 × 165.08
  4. Step 4: Simplify right side
    275.60x = 62,781.57
  5. Step 5: Solve for x
    x = 62,781.57/275.60
  6. Step 6: Final answer
    x = 227.80

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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.