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Finding the Fourth Proportional to 449.55, 620.34 and 272.58

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Solution

The fourth proportional to 449.55, 620.34 and 272.58 is: 376.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.55 : 620.34 = 272.58 : x
  2. Step 2: Convert to fraction form
    449.55/620.34 = 272.58/x
  3. Step 3: Cross multiply
    449.55x = 620.34 × 272.58
  4. Step 4: Simplify right side
    449.55x = 169,092.28
  5. Step 5: Solve for x
    x = 169,092.28/449.55
  6. Step 6: Final answer
    x = 376.14

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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.