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Finding the Fourth Proportional to 275.66, 380.46 and 188.31

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Solution

The fourth proportional to 275.66, 380.46 and 188.31 is: 259.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.66 : 380.46 = 188.31 : x
  2. Step 2: Convert to fraction form
    275.66/380.46 = 188.31/x
  3. Step 3: Cross multiply
    275.66x = 380.46 × 188.31
  4. Step 4: Simplify right side
    275.66x = 71,644.42
  5. Step 5: Solve for x
    x = 71,644.42/275.66
  6. Step 6: Final answer
    x = 259.90

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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.