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Finding the Fourth Proportional to 300.17, 413.78 and 230.31

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Solution

The fourth proportional to 300.17, 413.78 and 230.31 is: 317.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.17 : 413.78 = 230.31 : x
  2. Step 2: Convert to fraction form
    300.17/413.78 = 230.31/x
  3. Step 3: Cross multiply
    300.17x = 413.78 × 230.31
  4. Step 4: Simplify right side
    300.17x = 95,296.52
  5. Step 5: Solve for x
    x = 95,296.52/300.17
  6. Step 6: Final answer
    x = 317.47

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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.