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Finding the Fourth Proportional to 393.44, 543.25 and 269.11

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Solution

The fourth proportional to 393.44, 543.25 and 269.11 is: 371.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.44 : 543.25 = 269.11 : x
  2. Step 2: Convert to fraction form
    393.44/543.25 = 269.11/x
  3. Step 3: Cross multiply
    393.44x = 543.25 × 269.11
  4. Step 4: Simplify right side
    393.44x = 146,191.29
  5. Step 5: Solve for x
    x = 146,191.29/393.44
  6. Step 6: Final answer
    x = 371.57

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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.