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Finding the Fourth Proportional to 449.26, 619.92 and 272.20

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Solution

The fourth proportional to 449.26, 619.92 and 272.20 is: 375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.26 : 619.92 = 272.20 : x
  2. Step 2: Convert to fraction form
    449.26/619.92 = 272.20/x
  3. Step 3: Cross multiply
    449.26x = 619.92 × 272.20
  4. Step 4: Simplify right side
    449.26x = 168,742.22
  5. Step 5: Solve for x
    x = 168,742.22/449.26
  6. Step 6: Final answer
    x = 375.60

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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.