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Finding the Fourth Proportional to 550.80, 759.60 and 440.28

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Solution

The fourth proportional to 550.80, 759.60 and 440.28 is: 607.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.80 : 759.60 = 440.28 : x
  2. Step 2: Convert to fraction form
    550.80/759.60 = 440.28/x
  3. Step 3: Cross multiply
    550.80x = 759.60 × 440.28
  4. Step 4: Simplify right side
    550.80x = 334,436.69
  5. Step 5: Solve for x
    x = 334,436.69/550.80
  6. Step 6: Final answer
    x = 607.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.