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Finding the Fourth Proportional to 275.90, 380.79 and 159.48

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Solution

The fourth proportional to 275.90, 380.79 and 159.48 is: 220.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.90 : 380.79 = 159.48 : x
  2. Step 2: Convert to fraction form
    275.90/380.79 = 159.48/x
  3. Step 3: Cross multiply
    275.90x = 380.79 × 159.48
  4. Step 4: Simplify right side
    275.90x = 60,728.39
  5. Step 5: Solve for x
    x = 60,728.39/275.90
  6. Step 6: Final answer
    x = 220.11

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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.