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Finding the Fourth Proportional to 300.40, 413.66 and 238.04

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Solution

The fourth proportional to 300.40, 413.66 and 238.04 is: 327.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.40 : 413.66 = 238.04 : x
  2. Step 2: Convert to fraction form
    300.40/413.66 = 238.04/x
  3. Step 3: Cross multiply
    300.40x = 413.66 × 238.04
  4. Step 4: Simplify right side
    300.40x = 98,467.63
  5. Step 5: Solve for x
    x = 98,467.63/300.40
  6. Step 6: Final answer
    x = 327.79

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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.