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Finding the Fourth Proportional to 548.78, 822.67 and 219.93

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Solution

The fourth proportional to 548.78, 822.67 and 219.93 is: 329.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.78 : 822.67 = 219.93 : x
  2. Step 2: Convert to fraction form
    548.78/822.67 = 219.93/x
  3. Step 3: Cross multiply
    548.78x = 822.67 × 219.93
  4. Step 4: Simplify right side
    548.78x = 180,929.81
  5. Step 5: Solve for x
    x = 180,929.81/548.78
  6. Step 6: Final answer
    x = 329.69

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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.