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Finding the Fourth Proportional to 548.96, 822.48 and 394.64

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Solution

The fourth proportional to 548.96, 822.48 and 394.64 is: 591.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.96 : 822.48 = 394.64 : x
  2. Step 2: Convert to fraction form
    548.96/822.48 = 394.64/x
  3. Step 3: Cross multiply
    548.96x = 822.48 × 394.64
  4. Step 4: Simplify right side
    548.96x = 324,583.51
  5. Step 5: Solve for x
    x = 324,583.51/548.96
  6. Step 6: Final answer
    x = 591.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.