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Finding the Fourth Proportional to 413.42, 570.49 and 238.82

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Solution

The fourth proportional to 413.42, 570.49 and 238.82 is: 329.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.42 : 570.49 = 238.82 : x
  2. Step 2: Convert to fraction form
    413.42/570.49 = 238.82/x
  3. Step 3: Cross multiply
    413.42x = 570.49 × 238.82
  4. Step 4: Simplify right side
    413.42x = 136,240.97
  5. Step 5: Solve for x
    x = 136,240.97/413.42
  6. Step 6: Final answer
    x = 329.55

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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.