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Finding the Fourth Proportional to 275.46, 380.07 and 201.65

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Solution

The fourth proportional to 275.46, 380.07 and 201.65 is: 278.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.46 : 380.07 = 201.65 : x
  2. Step 2: Convert to fraction form
    275.46/380.07 = 201.65/x
  3. Step 3: Cross multiply
    275.46x = 380.07 × 201.65
  4. Step 4: Simplify right side
    275.46x = 76,641.12
  5. Step 5: Solve for x
    x = 76,641.12/275.46
  6. Step 6: Final answer
    x = 278.23

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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.