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Finding the Fourth Proportional to 548.01, 821.66 and 328.14

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Solution

The fourth proportional to 548.01, 821.66 and 328.14 is: 491.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.01 : 821.66 = 328.14 : x
  2. Step 2: Convert to fraction form
    548.01/821.66 = 328.14/x
  3. Step 3: Cross multiply
    548.01x = 821.66 × 328.14
  4. Step 4: Simplify right side
    548.01x = 269,617.87
  5. Step 5: Solve for x
    x = 269,617.87/548.01
  6. Step 6: Final answer
    x = 491.99

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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.