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Finding the Fourth Proportional to 419.91, 579.11 and 272.49

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Solution

The fourth proportional to 419.91, 579.11 and 272.49 is: 375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.91 : 579.11 = 272.49 : x
  2. Step 2: Convert to fraction form
    419.91/579.11 = 272.49/x
  3. Step 3: Cross multiply
    419.91x = 579.11 × 272.49
  4. Step 4: Simplify right side
    419.91x = 157,801.68
  5. Step 5: Solve for x
    x = 157,801.68/419.91
  6. Step 6: Final answer
    x = 375.80

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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.