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Finding the Fourth Proportional to 548.40, 822.90 and 223.80

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Solution

The fourth proportional to 548.40, 822.90 and 223.80 is: 335.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.40 : 822.90 = 223.80 : x
  2. Step 2: Convert to fraction form
    548.40/822.90 = 223.80/x
  3. Step 3: Cross multiply
    548.40x = 822.90 × 223.80
  4. Step 4: Simplify right side
    548.40x = 184,165.02
  5. Step 5: Solve for x
    x = 184,165.02/548.40
  6. Step 6: Final answer
    x = 335.82

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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.