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Finding the Fourth Proportional to 275.21, 413.14 and 217.47

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Solution

The fourth proportional to 275.21, 413.14 and 217.47 is: 326.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.21 : 413.14 = 217.47 : x
  2. Step 2: Convert to fraction form
    275.21/413.14 = 217.47/x
  3. Step 3: Cross multiply
    275.21x = 413.14 × 217.47
  4. Step 4: Simplify right side
    275.21x = 89,845.56
  5. Step 5: Solve for x
    x = 89,845.56/275.21
  6. Step 6: Final answer
    x = 326.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.