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Finding the Fourth Proportional to 275.62, 413.71 and 215.42

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Solution

The fourth proportional to 275.62, 413.71 and 215.42 is: 323.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.62 : 413.71 = 215.42 : x
  2. Step 2: Convert to fraction form
    275.62/413.71 = 215.42/x
  3. Step 3: Cross multiply
    275.62x = 413.71 × 215.42
  4. Step 4: Simplify right side
    275.62x = 89,121.41
  5. Step 5: Solve for x
    x = 89,121.41/275.62
  6. Step 6: Final answer
    x = 323.35

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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.