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Finding the Fourth Proportional to 550.70, 760.11 and 329.90

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Solution

The fourth proportional to 550.70, 760.11 and 329.90 is: 455.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.70 : 760.11 = 329.90 : x
  2. Step 2: Convert to fraction form
    550.70/760.11 = 329.90/x
  3. Step 3: Cross multiply
    550.70x = 760.11 × 329.90
  4. Step 4: Simplify right side
    550.70x = 250,760.29
  5. Step 5: Solve for x
    x = 250,760.29/550.70
  6. Step 6: Final answer
    x = 455.35

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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.