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Finding the Fourth Proportional to 679.12, 937.25 and 413.54

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Solution

The fourth proportional to 679.12, 937.25 and 413.54 is: 570.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.12 : 937.25 = 413.54 : x
  2. Step 2: Convert to fraction form
    679.12/937.25 = 413.54/x
  3. Step 3: Cross multiply
    679.12x = 937.25 × 413.54
  4. Step 4: Simplify right side
    679.12x = 387,588.68
  5. Step 5: Solve for x
    x = 387,588.68/679.12
  6. Step 6: Final answer
    x = 570.72

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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.