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Finding the Fourth Proportional to 548.87, 823.99 and 425.85

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Solution

The fourth proportional to 548.87, 823.99 and 425.85 is: 639.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.87 : 823.99 = 425.85 : x
  2. Step 2: Convert to fraction form
    548.87/823.99 = 425.85/x
  3. Step 3: Cross multiply
    548.87x = 823.99 × 425.85
  4. Step 4: Simplify right side
    548.87x = 350,896.14
  5. Step 5: Solve for x
    x = 350,896.14/548.87
  6. Step 6: Final answer
    x = 639.31

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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.