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Finding the Fourth Proportional to 325.91, 490.84 and 274.88

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Solution

The fourth proportional to 325.91, 490.84 and 274.88 is: 413.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.91 : 490.84 = 274.88 : x
  2. Step 2: Convert to fraction form
    325.91/490.84 = 274.88/x
  3. Step 3: Cross multiply
    325.91x = 490.84 × 274.88
  4. Step 4: Simplify right side
    325.91x = 134,918.96
  5. Step 5: Solve for x
    x = 134,918.96/325.91
  6. Step 6: Final answer
    x = 413.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.