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Finding the Fourth Proportional to 548.13, 822 and 218.91

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Solution

The fourth proportional to 548.13, 822 and 218.91 is: 328.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.13 : 822 = 218.91 : x
  2. Step 2: Convert to fraction form
    548.13/822 = 218.91/x
  3. Step 3: Cross multiply
    548.13x = 822 × 218.91
  4. Step 4: Simplify right side
    548.13x = 179,944.02
  5. Step 5: Solve for x
    x = 179,944.02/548.13
  6. Step 6: Final answer
    x = 328.29

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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.