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Finding the Fourth Proportional to 444.24, 665.91 and 320.85

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Solution

The fourth proportional to 444.24, 665.91 and 320.85 is: 480.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.24 : 665.91 = 320.85 : x
  2. Step 2: Convert to fraction form
    444.24/665.91 = 320.85/x
  3. Step 3: Cross multiply
    444.24x = 665.91 × 320.85
  4. Step 4: Simplify right side
    444.24x = 213,657.22
  5. Step 5: Solve for x
    x = 213,657.22/444.24
  6. Step 6: Final answer
    x = 480.95

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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.