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Finding the Fourth Proportional to 550.72, 821.28 and 481.60

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Solution

The fourth proportional to 550.72, 821.28 and 481.60 is: 718.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.72 : 821.28 = 481.60 : x
  2. Step 2: Convert to fraction form
    550.72/821.28 = 481.60/x
  3. Step 3: Cross multiply
    550.72x = 821.28 × 481.60
  4. Step 4: Simplify right side
    550.72x = 395,528.45
  5. Step 5: Solve for x
    x = 395,528.45/550.72
  6. Step 6: Final answer
    x = 718.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.