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Finding the Fourth Proportional to 300.66, 413.73 and 253.86

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Solution

The fourth proportional to 300.66, 413.73 and 253.86 is: 349.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.66 : 413.73 = 253.86 : x
  2. Step 2: Convert to fraction form
    300.66/413.73 = 253.86/x
  3. Step 3: Cross multiply
    300.66x = 413.73 × 253.86
  4. Step 4: Simplify right side
    300.66x = 105,029.50
  5. Step 5: Solve for x
    x = 105,029.50/300.66
  6. Step 6: Final answer
    x = 349.33

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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.