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Finding the Fourth Proportional to 548.45, 822.13 and 425.33

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Solution

The fourth proportional to 548.45, 822.13 and 425.33 is: 637.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.45 : 822.13 = 425.33 : x
  2. Step 2: Convert to fraction form
    548.45/822.13 = 425.33/x
  3. Step 3: Cross multiply
    548.45x = 822.13 × 425.33
  4. Step 4: Simplify right side
    548.45x = 349,676.55
  5. Step 5: Solve for x
    x = 349,676.55/548.45
  6. Step 6: Final answer
    x = 637.57

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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.