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Finding the Fourth Proportional to 449.05, 619.60 and 271.96

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Solution

The fourth proportional to 449.05, 619.60 and 271.96 is: 375.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.05 : 619.60 = 271.96 : x
  2. Step 2: Convert to fraction form
    449.05/619.60 = 271.96/x
  3. Step 3: Cross multiply
    449.05x = 619.60 × 271.96
  4. Step 4: Simplify right side
    449.05x = 168,506.42
  5. Step 5: Solve for x
    x = 168,506.42/449.05
  6. Step 6: Final answer
    x = 375.25

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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.