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Finding the Fourth Proportional to 394.11, 543.38 and 263.03

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Solution

The fourth proportional to 394.11, 543.38 and 263.03 is: 362.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.11 : 543.38 = 263.03 : x
  2. Step 2: Convert to fraction form
    394.11/543.38 = 263.03/x
  3. Step 3: Cross multiply
    394.11x = 543.38 × 263.03
  4. Step 4: Simplify right side
    394.11x = 142,921.21
  5. Step 5: Solve for x
    x = 142,921.21/394.11
  6. Step 6: Final answer
    x = 362.64

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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.