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Finding the Fourth Proportional to 419.22, 578.49 and 272.13

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Solution

The fourth proportional to 419.22, 578.49 and 272.13 is: 375.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.22 : 578.49 = 272.13 : x
  2. Step 2: Convert to fraction form
    419.22/578.49 = 272.13/x
  3. Step 3: Cross multiply
    419.22x = 578.49 × 272.13
  4. Step 4: Simplify right side
    419.22x = 157,424.48
  5. Step 5: Solve for x
    x = 157,424.48/419.22
  6. Step 6: Final answer
    x = 375.52

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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.