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Finding the Fourth Proportional to 275.41, 380.19 and 187

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Solution

The fourth proportional to 275.41, 380.19 and 187 is: 258.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.41 : 380.19 = 187 : x
  2. Step 2: Convert to fraction form
    275.41/380.19 = 187/x
  3. Step 3: Cross multiply
    275.41x = 380.19 × 187
  4. Step 4: Simplify right side
    275.41x = 71,095.53
  5. Step 5: Solve for x
    x = 71,095.53/275.41
  6. Step 6: Final answer
    x = 258.14

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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.