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Finding the Fourth Proportional to 300.96, 413.84 and 286.24

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Solution

The fourth proportional to 300.96, 413.84 and 286.24 is: 393.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.96 : 413.84 = 286.24 : x
  2. Step 2: Convert to fraction form
    300.96/413.84 = 286.24/x
  3. Step 3: Cross multiply
    300.96x = 413.84 × 286.24
  4. Step 4: Simplify right side
    300.96x = 118,457.56
  5. Step 5: Solve for x
    x = 118,457.56/300.96
  6. Step 6: Final answer
    x = 393.60

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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.