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Finding the Fourth Proportional to 300.58, 413.31 and 256.84

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Solution

The fourth proportional to 300.58, 413.31 and 256.84 is: 353.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.58 : 413.31 = 256.84 : x
  2. Step 2: Convert to fraction form
    300.58/413.31 = 256.84/x
  3. Step 3: Cross multiply
    300.58x = 413.31 × 256.84
  4. Step 4: Simplify right side
    300.58x = 106,154.54
  5. Step 5: Solve for x
    x = 106,154.54/300.58
  6. Step 6: Final answer
    x = 353.17

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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.