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Finding the Fourth Proportional to 276.08, 413.81 and 113.68

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Solution

The fourth proportional to 276.08, 413.81 and 113.68 is: 170.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.08 : 413.81 = 113.68 : x
  2. Step 2: Convert to fraction form
    276.08/413.81 = 113.68/x
  3. Step 3: Cross multiply
    276.08x = 413.81 × 113.68
  4. Step 4: Simplify right side
    276.08x = 47,041.92
  5. Step 5: Solve for x
    x = 47,041.92/276.08
  6. Step 6: Final answer
    x = 170.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.