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Finding the Fourth Proportional to 322.13, 443.72 and 272.28

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Solution

The fourth proportional to 322.13, 443.72 and 272.28 is: 375.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.13 : 443.72 = 272.28 : x
  2. Step 2: Convert to fraction form
    322.13/443.72 = 272.28/x
  3. Step 3: Cross multiply
    322.13x = 443.72 × 272.28
  4. Step 4: Simplify right side
    322.13x = 120,816.08
  5. Step 5: Solve for x
    x = 120,816.08/322.13
  6. Step 6: Final answer
    x = 375.05

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.