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Finding the Fourth Proportional to 391.27, 540.37 and 267.25

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Solution

The fourth proportional to 391.27, 540.37 and 267.25 is: 369.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.27 : 540.37 = 267.25 : x
  2. Step 2: Convert to fraction form
    391.27/540.37 = 267.25/x
  3. Step 3: Cross multiply
    391.27x = 540.37 × 267.25
  4. Step 4: Simplify right side
    391.27x = 144,413.88
  5. Step 5: Solve for x
    x = 144,413.88/391.27
  6. Step 6: Final answer
    x = 369.09

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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.