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Finding the Fourth Proportional to 489.11, 739.21 and 480.60

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Solution

The fourth proportional to 489.11, 739.21 and 480.60 is: 726.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.11 : 739.21 = 480.60 : x
  2. Step 2: Convert to fraction form
    489.11/739.21 = 480.60/x
  3. Step 3: Cross multiply
    489.11x = 739.21 × 480.60
  4. Step 4: Simplify right side
    489.11x = 355,267.70
  5. Step 5: Solve for x
    x = 355,267.70/489.11
  6. Step 6: Final answer
    x = 726.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.