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Finding the Fourth Proportional to 449.45, 620.21 and 252.92

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Solution

The fourth proportional to 449.45, 620.21 and 252.92 is: 349.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.45 : 620.21 = 252.92 : x
  2. Step 2: Convert to fraction form
    449.45/620.21 = 252.92/x
  3. Step 3: Cross multiply
    449.45x = 620.21 × 252.92
  4. Step 4: Simplify right side
    449.45x = 156,863.80
  5. Step 5: Solve for x
    x = 156,863.80/449.45
  6. Step 6: Final answer
    x = 349.01

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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.