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Finding the Fourth Proportional to 548.79, 822.60 and 285.38

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Solution

The fourth proportional to 548.79, 822.60 and 285.38 is: 427.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.79 : 822.60 = 285.38 : x
  2. Step 2: Convert to fraction form
    548.79/822.60 = 285.38/x
  3. Step 3: Cross multiply
    548.79x = 822.60 × 285.38
  4. Step 4: Simplify right side
    548.79x = 234,749.48
  5. Step 5: Solve for x
    x = 234,749.48/548.79
  6. Step 6: Final answer
    x = 427.76

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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.