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Finding the Fourth Proportional to 548.24, 821.96 and 288.12

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Solution

The fourth proportional to 548.24, 821.96 and 288.12 is: 431.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.24 : 821.96 = 288.12 : x
  2. Step 2: Convert to fraction form
    548.24/821.96 = 288.12/x
  3. Step 3: Cross multiply
    548.24x = 821.96 × 288.12
  4. Step 4: Simplify right side
    548.24x = 236,823.12
  5. Step 5: Solve for x
    x = 236,823.12/548.24
  6. Step 6: Final answer
    x = 431.97

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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.