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Finding the Fourth Proportional to 300.31, 413.86 and 284.36

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Solution

The fourth proportional to 300.31, 413.86 and 284.36 is: 391.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.31 : 413.86 = 284.36 : x
  2. Step 2: Convert to fraction form
    300.31/413.86 = 284.36/x
  3. Step 3: Cross multiply
    300.31x = 413.86 × 284.36
  4. Step 4: Simplify right side
    300.31x = 117,685.31
  5. Step 5: Solve for x
    x = 117,685.31/300.31
  6. Step 6: Final answer
    x = 391.88

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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.