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Finding the Fourth Proportional to 413.11, 618.72 and 268.39

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Solution

The fourth proportional to 413.11, 618.72 and 268.39 is: 401.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.11 : 618.72 = 268.39 : x
  2. Step 2: Convert to fraction form
    413.11/618.72 = 268.39/x
  3. Step 3: Cross multiply
    413.11x = 618.72 × 268.39
  4. Step 4: Simplify right side
    413.11x = 166,058.26
  5. Step 5: Solve for x
    x = 166,058.26/413.11
  6. Step 6: Final answer
    x = 401.97

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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.