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Finding the Fourth Proportional to 394.44, 543.96 and 277.80

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Solution

The fourth proportional to 394.44, 543.96 and 277.80 is: 383.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.44 : 543.96 = 277.80 : x
  2. Step 2: Convert to fraction form
    394.44/543.96 = 277.80/x
  3. Step 3: Cross multiply
    394.44x = 543.96 × 277.80
  4. Step 4: Simplify right side
    394.44x = 151,112.09
  5. Step 5: Solve for x
    x = 151,112.09/394.44
  6. Step 6: Final answer
    x = 383.11

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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.