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Finding the Fourth Proportional to 419.49, 579.03 and 272.13

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Solution

The fourth proportional to 419.49, 579.03 and 272.13 is: 375.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.49 : 579.03 = 272.13 : x
  2. Step 2: Convert to fraction form
    419.49/579.03 = 272.13/x
  3. Step 3: Cross multiply
    419.49x = 579.03 × 272.13
  4. Step 4: Simplify right side
    419.49x = 157,571.43
  5. Step 5: Solve for x
    x = 157,571.43/419.49
  6. Step 6: Final answer
    x = 375.63

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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.