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Finding the Fourth Proportional to 413.69, 570.90 and 239.04

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Solution

The fourth proportional to 413.69, 570.90 and 239.04 is: 329.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.69 : 570.90 = 239.04 : x
  2. Step 2: Convert to fraction form
    413.69/570.90 = 239.04/x
  3. Step 3: Cross multiply
    413.69x = 570.90 × 239.04
  4. Step 4: Simplify right side
    413.69x = 136,467.94
  5. Step 5: Solve for x
    x = 136,467.94/413.69
  6. Step 6: Final answer
    x = 329.88

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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.