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Finding the Fourth Proportional to 300.26, 413.53 and 280.74

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Solution

The fourth proportional to 300.26, 413.53 and 280.74 is: 386.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.26 : 413.53 = 280.74 : x
  2. Step 2: Convert to fraction form
    300.26/413.53 = 280.74/x
  3. Step 3: Cross multiply
    300.26x = 413.53 × 280.74
  4. Step 4: Simplify right side
    300.26x = 116,094.41
  5. Step 5: Solve for x
    x = 116,094.41/300.26
  6. Step 6: Final answer
    x = 386.65

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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.