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Finding the Fourth Proportional to 276.08, 413.57 and 129.63

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Solution

The fourth proportional to 276.08, 413.57 and 129.63 is: 194.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.08 : 413.57 = 129.63 : x
  2. Step 2: Convert to fraction form
    276.08/413.57 = 129.63/x
  3. Step 3: Cross multiply
    276.08x = 413.57 × 129.63
  4. Step 4: Simplify right side
    276.08x = 53,612.95
  5. Step 5: Solve for x
    x = 53,612.95/276.08
  6. Step 6: Final answer
    x = 194.20

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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.