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Finding the Fourth Proportional to 413.89, 571.20 and 227.39

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Solution

The fourth proportional to 413.89, 571.20 and 227.39 is: 313.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.89 : 571.20 = 227.39 : x
  2. Step 2: Convert to fraction form
    413.89/571.20 = 227.39/x
  3. Step 3: Cross multiply
    413.89x = 571.20 × 227.39
  4. Step 4: Simplify right side
    413.89x = 129,881.46
  5. Step 5: Solve for x
    x = 129,881.46/413.89
  6. Step 6: Final answer
    x = 313.81

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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.