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Finding the Fourth Proportional to 449.51, 620.30 and 252.99

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Solution

The fourth proportional to 449.51, 620.30 and 252.99 is: 349.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.51 : 620.30 = 252.99 : x
  2. Step 2: Convert to fraction form
    449.51/620.30 = 252.99/x
  3. Step 3: Cross multiply
    449.51x = 620.30 × 252.99
  4. Step 4: Simplify right side
    449.51x = 156,930.33
  5. Step 5: Solve for x
    x = 156,930.33/449.51
  6. Step 6: Final answer
    x = 349.12

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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.