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Finding the Fourth Proportional to 449.39, 620.13 and 272.39

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Solution

The fourth proportional to 449.39, 620.13 and 272.39 is: 375.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.39 : 620.13 = 272.39 : x
  2. Step 2: Convert to fraction form
    449.39/620.13 = 272.39/x
  3. Step 3: Cross multiply
    449.39x = 620.13 × 272.39
  4. Step 4: Simplify right side
    449.39x = 168,917.21
  5. Step 5: Solve for x
    x = 168,917.21/449.39
  6. Step 6: Final answer
    x = 375.88

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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.